What is the maximum force of friction under such conditions? from the ground level to a point that is 15 What is the total mechanical energy of the roller coaster cart at point A? The coefficient of kinetic friction between the sled and the snow is 0.20. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Many amusement parks have rides that make vertical loops like the one shown below. rev2023.3.3.43278. An airplane flies at 120.0 m/s and banks at a3030angle. KE = 500kg 9.81 m s 30m. On average, these carts can weight between 600 and about 1000 pounds each. Dont I need to know the angles the hills make with the horizontal. Seriously, I would not trust rides like that. Calculate the tension in the two ropes if the person is momentarily motionless. The result of the preceding problem may be useful, but be careful to consider the fact that the snow boarder is going uphill. Can any combination of forces be a centripetal force? Some problems contain multiple force vectors acting in different directions on an object. What are the units used for the ideal gas law? (Energy does not require dividing vectors into components, or doing Second Law problems to find acceleration.) Explain. (b) The elevator continues upward at constant velocity for 8.50 s. What is the tension in the cable during this time? (c) Find the centripetal force vector as a function of time. Neglecting frictional losses, what is the expected speed of the coaster as it passes over the top of the Rotating and accelerated frames of reference are noninertial. Others use P.E. Athletes such as swimmers and bicyclists wear body suits in competition. What type of movement could be caused by this force? WebThe current coasters have these weight limits based on the manufacturer requirements: SFA: Batwing256 pounds Since only one coaster has an official weight limit, then this does not mean that those with very a large weight can ride. (c) At Point C. Here all the initial #PE# has got converted into #KE# of the car. Continue to Step 2 to solve for the stopping force required to bring the roller coaster to rest at Point D. An average force of 4200 N is required to stop the roller-coaster by Point D when the brakes are applied at Point C. No further mathematical solution is required for this problem. If non-conservative forces are either known or small and if energy is converted from one form to another between the locations, then any time you relate speed and position of an object at two different points conservation of energy is the most direct way to understand the problem. > coaster carriage weighs? Is there any difference between their apparent weightlessness in orbit and in the aircraft? (a) What is the acceleration of the freight car? At any point #x# Yup, though they are admitedly a rare breed. Because there is no friction over this portion of the track, the only energy conversion that takes place is between kinetic energy and gravitational potential energy. The incline has friction. In the simple Bohr model of the ground state of the hydrogen atom, the electron travels in a circular orbit around a fixed proton. (a) If the force is 33 N, what is the horizontal acceleration of the sled? Part B Make it so the following parameters are true: 1) The, 6a(5/4) + 2b = 0 3a*2^2 + 2b*2 + c = 0 3a(1/2)^2 + 2b(1/2) + c = 0 how do these three systems of equations produce H(d) = 4d^3 - 15d^2 + 12d + 1 The Question: The given function H(d) = ad^3 + bd^2 + cd, First : 3a*2^2 + 2b*2 + c = 0 3a(1/2)^2 + 2b(1/2) + c = 0 How do the equations equal zero when, H'(1/2) < 0, H'(2) > 0, and H'(2) = 1/2 Second: 6a(5/4) + 2b = 0 3a*2^2 + 2b*2 + c = 0 3a(1/2)^2 +. (See picture below) What is the maximum speed the vehicle can have at point B and still remain on the track? Just like each said, as long as you can fit into t Continue Reading 6 Sponsored by The Penny Hoarder Dont I need to know the coefficient of friction to solve for stopping force? Some books use PE for potential energy. Roller coasters mostly rely on two simple principles: conversion of Potential Energy to Kinetic Energy and vice versa, and conservation of energy. What is it? If the gravitational potential energy of the car-Earth system is taken to be zero at C, what is its value passes over a massless pulley, as, A:Given data- View Available Hint(s) Submit Provide Feedback or Part B for Part J undo for Part B redo for Part B reset for Part B keyboard shortcuts for Part B help for Part B m, Principles of Physics: A Calculus-Based Text. WebA 515-kg (empty weight), single cart roller coaster carrying 4 passengers (average mass of 64 kg per person) is towed to the top of a hill. The lunch box leaves a trail in the dust on the merry-go-round. What is the percentage increase in the perceived weight of the passengers? The height of the car at point 725 is the minimum height that is necessary for the car to stay on the loop. Roller coasters are therefore not built with circular loops in vertical planes. Not sure if there really is a "typical" weight. A 1000 kg roller coaster begins on a 10 m tall hill with an initial velocity of 6m/s and travels down before traveling up a second hill. Before Collision By what factor does the drag force on a car increase as it goes from 65 to 110 km/h? The, Q:, Problem 7: A computer disk starts from rest at time t = 0 and accelerates uniformly for 0.500 s, A:Given data- 6. r=a-b+c, Q:8. , A:Here maximum current is Imax=9.5A Each car on The Beast weighs 2,300 pounds with the weight of a full train (without riders) 13,800 pounds. Submit > just a thought The glue on a piece of tape can exert forces. (a) Find the velocity and acceleration vectors as functions of time. Also use g = 10 m/s2. total positive charge Q = 0.122 nC uniformly, Q:A dipole with charges ? In its present state, the crate is just ready to slip and start to move down the plane. gravitational potential energyA = kinetic energyB + gravitational potential energyB or mghA= mvB2 + mghB as seen in the equation above. Supposing the mass of the skier is 50 kg, what is the speed of the skier at point B ? properties a lens, Q:One student pulls a car with 20 N to the East. Only two forces act on the mass. Is that trail straight, curved to the left, or curved to the right? Find the tension in the string: (a) at the top of the circle, (b) at the bottom of the circle, and (c) at a distance of 12.5 cm from the center of the circle(r=12.5cm).(r=12.5cm). (c) At Point C #approx 33.58m//s# Describe this process in more detail, in particular, explaining how it is related to the fact that kinetic friction is less than static friction. On average, these carts can weight between 600 and about 1000 pounds each. What is the coefficient of kinetic friction between the child and the surface of the incline? 7.000 Only two significant figures were given in the text of the problem, so only two significant figures are included in the solution. (b) Calculate the centripetal acceleration. Is it possible to rotate a window 90 degrees if it has the same length and width? = Q:Which model shows how light waves react with a red jacket? If the car goes over the top at just the right speed, gravity alone will supply the centripetal force. As the cart moves through the loop, it is moving in a circle and therefore it is accelerating. 0, Q:Each of the six real batteries in the figure has an emf of 18.6 V and a resistance of 3.89 02. Again, energy is the most direct way to understand this problem. The car slides off the road. View Available Hint(s) (b) What is its acceleration once it starts to move, if that force is maintained? As cars travel, oil and gasoline leaks onto the road surface. (Drag area is0.70m20.70m2) (b) What is the drag force at 70 km/h and 100 km/h for a Hummer H2? The CERN particle accelerator is circular with a circumference of 7.0 km. the bottom,, Q:a) Calculate the height of a cliff if it takes 2.56 s for a rock to hit the ground when it is thrown, Q:What are (a) the x component, (b) they component, and (c) the z component of 7 = b + c if =, A:It is given that, What maximum distance can the truck travel (starting from rest and moving horizontally with constant acceleration) in 3.0 s without having the box slide? Assume all values are accurate to three significant digits. Take the density of the bacterium to be1.10103kg/m31.10103kg/m3. For safety, the cars are attached to the rails in such a way that they cannot fall off. given no change in kinetic energyKE=0 Those will also be different than the wide variety of different steel coaster trains, as will the Gerstlauer wood coaster trains and cars. A contestant in a winter sporting event pushes a 45.0-kg block of ice across a frozen lake as shown below. Still others may write it as KE1 + PE1 + Eadded to the system = KE2 + PE2 + Eleaving the system. 2-kg stationary block. Use a free-body diagram in your answer. The best answers are voted up and rise to the top, Not the answer you're looking for? 20 The roller coaster cart has a mass of 500 kg, and the spring launcher has a spring constant of 1500 N/m. Assume the child is not holding on and does not wear a seat belt. Find the positionr(t)r(t)and velocityv(t)v(t)as functions of timet. A particle of massmis located at the origin. Physics. Including Wnc in some form is more general and gives an equation that is true in all situations, including those with non-conservative forces such as the second question in this problem. The ride's queue line is surrounded by bamboo, which adds to the jungle theming. The normal force on each rider follows the same rule. A time dependent force ofF(t)F(t)is applied at timet=0t=0, and its components areFx(t)=p+ntFx(t)=p+ntandFy(t)=qtFy(t)=qtwherep,q, andnare constants. You can neglect air resistance in both parts. The radius of curvature is smaller at the top than on the sides so that the downward centripetal acceleration at the top will be greater than the acceleration due to gravity, keeping the passengers pressed firmly into their seats. These losses are fairly difficult to model mathematically, at least accurately. acceleration = a = 4 m/s2 Suppose that the resistive force of the air on a skydiver can be approximated byf=bv2.f=bv2. Second question has no real answer unless we assume that the potential energy is zero at the ground level. What magnitude force must act up and parallel to the incline for the bin to move down the incline at constant velocity? The terminal speed is observed to be 2.00 cm/s. -The radius of the circle is 15m. (The speed of light isv=3.00108m/s.v=3.00108m/s.) WebSolution for (Figure 1) A roller-coaster car may be represented by a block of mass 50.0 kg. If the particle is fired vertically with velocityv0v0from Earths surface, determine its velocity as a function of positionr. (Hint:useadr=vdv,adr=vdv,the rearrangement mentioned in the text. A constant resultant force of(2.0i+4.0j)N(2.0i^+4.0j^)Nthen acts on the object for 3.0 s. What is the magnitude of the objects velocity at the end of the 3.0-s interval? A motor hauls the cars to the top of a high hill and from that point on gravity is doing all the work. Assume a coefficient of friction of 1.0. Intamin Hyper train? If an object is to rest on an incline without slipping, then friction must equal the component of the weight of the object parallel to the incline. As you can see, the mass of car (and riders) $m$ does play part here but again it seems folly to rely on loading specifications rather than safe design. roller coaster with weight requirement for a car, We've added a "Necessary cookies only" option to the cookie consent popup. (c) Determined2r/dt2d2r/dt2and show thatais given byac=r2.ac=r2. Assume that the force is exerted parallel to her legs. The radius of the curve is 310 m. What is the angle of banking of the highway? Calculate the average acceleration of the shell in the tube as it goes from zero to the velocity found in (a). Friction is a contact force that opposes the motion or attempted motion between two systems. Find the minimum initial height hminat which the car can be released that still allows the car to stay in contact with the track at the top of the loop. The space probe has mass 20.0 kg and contains 90.0 kg of fuel. First week only $4.99! Q:12-196: The motor at C pulls in the cable with an acceleration ac = (3t2) m/s2, where t is in, Q:IONIZING RADIATION (characteristics) The situation is same as at #t=0#, where #v_y =0#. (a) What is the acceleration of the car? (b) The car goes over the top at slower than this speed? Explain in an inertial frame of reference (Earth is nearly one) what pins the riders to the wall, and identify all forces acting on them. The force of (Drag area is2.44m2)2.44m2)Assume all values are accurate to three significant digits. All surfaces are frictionless. A 35.0-kg dolphin decelerates from 12.0 to 7.50 m/s in 2.30 s to join another dolphin in play. M You will first need to note that the drag force is equal to the weight at terminal velocity. There are no significant non-conservative forces (like friction) present between Points A and B, and so the work done by non-conservative forces is about zero. (b) Calculate the force in the coupling between the dogs and the sled. A large rocket has a mass of2.00106kg2.00106kgat takeoff, and its engines produce a thrust of3.50107N.3.50107N. A 1250-W toaster, a 320-W blender, and a 75-W lamp are, Q:True or FalseThe planet that has the longest day is mercury, A:Actually, the planet with the longest day in our solar system is Venus, not Mercury. wat about for steel coasters? ok so how much does a normal car weigh in comparison to a rollercoaster carriage? Explain. Two of the forces areF1=(3i+5j6k)NF1=(3i^+5j^6k^)NandF2=(4i7j+2k)N.F2=(4i^7j^+2k^)N.Find the third force. (c) Does the block actually reach the top of the track, or does it fall off before reaching the top? We say that the car at that point has a Potential Energy $U$ according to: $U=mgh_1$, where $g=9.81\:\mathrm{ms^{-2}}$ the Earth's acceleration constant, $m$ is the mass of the car (and riders) and $h_1$ that height above the reference line. Find the kinetic energy K of the car at the top of the loop. For that reason I'm very surprised that a roller coaster operator would specify any loads, instead of relying on a fail safe design. A massless rope to which a force can be applied parallel to the surface is attached to the crate and leads to the top of the incline. Do new devs get fired if they can't solve a certain bug? By=1.2 T, Q:A car speeds up uniformly from 10 m/s to 20 m/s while traveling a The weight of roller coaster carts varies greatly with the roller coaster style. Because essentially no energy is lost from the system (you are told friction and air resistance are negligible,) the amount of energy in the system remains constant throughout. About yea much, give or take. e) What is the initial KE,, A:According to guidelines we can solved only three subparts. (a) What is the coefficient of static friction? This makes physical sensethe force required to stop the roller-coaster depends on its mass. Originally the PTC cars (3 seater) weighed about 1500 to 1600 lbs. Suppose a steel ball bearing (density7.8103kg/m37.8103kg/m3, diameter 3.0 mm) is dropped in a container of motor oil. Find the terminal velocity (in meters per second and kilometers per hour) of an 80.0-kg skydiver falling in a pike (headfirst) position with a surface area of0.140m20.140m2. The magnitude of the force on a particle increases as the cube of the distance from that point; that is Fr3 , if the distance from P to the position of the particle is r. Let b be the proportionality constant, and write the magnitude of the force as F=br3. Human nerve cells have a net negative charge and the material If the coefficient of kinetic friction between tires and road is 0.550, and the acceleration was constant during braking, how fast was the car going when the wheels became locked? The contestant now pulls the block of ice with a rope over his shoulder at the same angle above the horizontal as shown below. The radius of the loop is 20 m. What is the height of the car at point A? (b) Once the rescue is complete, Tarzan and Jane must swing back across the river. (Ignore rolling.) A time-dependent force ofF(t)F(t)is applied at timet=0t=0, and its components areFx(t)=ptFx(t)=ptandFy(t)=n+qtFy(t)=n+qtwherep,q, andnare constants. (d) How high has the elevator moved above its original starting point, and what is its final velocity? (c) What does the scale read if the elevator moves upward at constant velocity? A freight train consists of two8.00105-kg8.00105-kgengines and 45 cars with average masses of5.50105kg.5.50105kg. Car can go only up to initial height #h#, 59739 views How long will it take for each skydiver to reach the ground (assuming the time to reach terminal velocity is small)? As shown below, the mass of block 1 ism1=4.0kg,m1=4.0kg,while the mass of block 2 ism2=8.0kg.m2=8.0kg. What is the total mechanical energy of the roller coaster at point A? Is a PhD visitor considered as a visiting scholar? (b) How far does he travel? The coefficient of kinetic friction between the blocks and the surface is 0.25. In a roller coaster, does the rear car have a higher acceleration/speed? Calculate the stopping distance if the coefficient of kinetic friction of the tires is 0.500. (These muscles are called the medial and lateral heads of the gastrocnemius muscle.) In this problem, you are first asked to find how fast a roller-coaster moves at a given point on the track. Repeat the preceding problem for a car with four-wheel drive. WebFind many great new & used options and get the best deals for LEGO FRIENDS: Amusement Park Roller Coaster (41130) Complete Boxed Retired! Again, what do you call a "normal" car? > coaster carriage weighs? The magnitude of static friction force between two materials stationary relative to each other is determined using the coefficient of static friction, which depends on both materials. WebMany roller coasters have a vertical loop, 20 m high. (a), A:Note: Since you have posted a question with multiple sub-parts, we will solve the first three, Q:How is white light different from the rest of the electromagnetic spectrum? The coefficient of static friction between the box and the surface on which it rests is 0.24. Find answers to questions asked by students like you. Express your answer numerically, in meters. The problem with trying to answer is that your questions are far to general. Average Weight of a Roller Coaster Cart in Kg Pe_Emery.Brandt.286 April 26, 2022 A Roller Coaster Vehicle Has A Mass Of 500 Kg When Fully Loaded With Passengers A If The Vehicle Youtube An observer on the ground concludes that the forces on the cart are the force of gravity and the support from the track. Take D = 50.0 m, F = 110 N, L = 40.0 m, and = 50.0. A 560-g squirrel with a surface area of930cm2930cm2falls from a 5.0-m tree to the ground. Draw the free body diagrams for the car going around a horizontal curve, the bottom of a vertical loop, and the top of a vertical loop in which the cart is upside down. In the figure, the coefficient of kinetic friction between the surface and the blocks isk.k. The kinetic energy of the roller coaster is 2*10^5 J The formula to calculate kinetic energy is, E_k=1/2mv^2 Here, The mass of the roller coaster is, m= 1000 kg The speed of the roller coaster is, v= 20 ms^-1 Therefore, E_k=1/2*1000*20^2 =2*10^5 J (b) What is its acceleration once it starts to move, if that force is maintained? Plate separation d = 10 mm =10 10-3m Topological invariance of rational Pontrjagin classes for non-compact spaces, Bulk update symbol size units from mm to map units in rule-based symbology. In the figure, a frictionless roller coaster car of mass m = 805 kg tops the first hill with speed vi = 18 m/s at height h = 41 m. What is the speed of the car at (a) point A, (b) point B, and (c) point C? The weight of roller coaster Assume a cart enters the loop at a speed of 25 m/s or 56 mph. (Use a drag coefficient for a horizontal skydiver.) If the order of the barges of the preceding exercise is reversed so that the tugboat pulls the3.00103-kg3.00103-kgbarge with a force of20.0103N,20.0103N,what are the acceleration of the barges and the tension in the coupling cable? A. Another student pulls the IfM=1.0kg,M=1.0kg,find an expression for the magnitude of the acceleration of either block (in terms ofF,k,k,andg). the end. If you wish to reduce the stress (which is related to centripetal force) on high-speed tires, would you use large- or small-diameter tires? U = potential energy = m g h (The scale exerts an upward force on her equal to its reading.) (a) A 22.0-kg child is riding a playground merry-go-round that is rotating at 40.0 rev/min. Tom says a satellite in orbit is not in free fall because the acceleration due to gravity is not9.80m/s29.80m/s2. (b) Find the tension in the rope. A tugboat pulls the front barge with a horizontal force of magnitude20.0103N,20.0103N,and the frictional forces of the water on the front and rear barges are8.00103N8.00103Nand10.0103N,10.0103N,respectively. ), A car of mass 1000.0 kg is traveling along a level road at 100.0 km/h when its brakes are applied. The weight of roller coaster carts varies greatly with the roller coaster style. It sits at the top of a hill with height 85 m. If it drops from this hill, how fast is it going when it reaches the bottom? It then drops 46 m before climbing 28 m to the top of the second hill. is placed in an electric field. One crazy one that I've seen posted is that Skyrush's trains weigh 13 tons! The tallest lift hill in the world is Carowinds Fury 325 at 325 feet tall (99.06 meters). A roller coaster whose average speed is 32 ms is at the top of a 72m hill and weighs 966N. When you push a piece of chalk across a chalkboard, it sometimes screeches because it rapidly alternates between slipping and sticking to the board. (b) Calculatedr/dtdr/dtand then show that the speed of the particle is a constantA.A. In one amusement park ride, riders enter a large vertical barrel and stand against the wall on its horizontal floor. WebThings You Should Know About Roller Coasters Vertical Drops: Roller coasters almost always begin with an initial vertical drop. :). #implies v_B^2=9.8 xx 41=401.8#, for y direction only (b) If the block were to reach the top of the track, what would be its speed at that point? No. #implies v_B^2=gh# (a) When rebuilding his cars engine, a physics major must exert3.001023.00102N of force to insert a dry steel piston into a steel cylinder. Site Map (c) Compare each force with his weight. The values for Point can be put into the equation directly from your picture. As you will learn in the course of this problem, (Figure 1)A roller-coaster car may be represented by a block of mass 50.0 kg . Consider the 52.0-kg mountain climber shown below. TOP VIEWS It is equally fine to pick the lowest point considered in the problem (Point D) to be h = 0. If the cart starts at a height h1 = 10m, how much must the. WebWhen you look at a roller coaster, it might be easy to think that they're engine powered. The wheels become locked (stop rolling), and the resulting skid marks are 32.0 meters long. Roller Coasters, Parks & Attractions Message Board. This is an inertial force sensed and used by the riders to explain events in the rotating frame of reference of the barrel. The body and spring are placed on a horizontal frictionless surface and rotated about the held end of the spring at 2.0 rev/s. A roller coaster car starts from rest at the top of a track 30.0 m long and inclined at20.020.0to the horizontal. Find the change, Q:A 800 lb horse pulls a 200 lb cart with 2.2 Coordinate Systems and Components of a Vector, 3.1 Position, Displacement, and Average Velocity, 3.3 Average and Instantaneous Acceleration, 3.6 Finding Velocity and Displacement from Acceleration, 4.5 Relative Motion in One and Two Dimensions, 8.2 Conservative and Non-Conservative Forces, 8.4 Potential Energy Diagrams and Stability, 10.2 Rotation with Constant Angular Acceleration, 10.3 Relating Angular and Translational Quantities, 10.4 Moment of Inertia and Rotational Kinetic Energy, 10.8 Work and Power for Rotational Motion, 13.1 Newtons Law of Universal Gravitation, 13.3 Gravitational Potential Energy and Total Energy, 15.3 Comparing Simple Harmonic Motion and Circular Motion, 17.4 Normal Modes of a Standing Sound Wave, 1.4 Heat Transfer, Specific Heat, and Calorimetry, 2.3 Heat Capacity and Equipartition of Energy, 4.1 Reversible and Irreversible Processes, 4.4 Statements of the Second Law of Thermodynamics. ), Show that the acceleration of any object down a frictionless incline that makes an anglewith the horizontal isa=gsina=gsin. Draw the free body diagrams for the car going around a horizontal curve, the bottom of a vertical loop, and the top of a vertical loop in which the cart is upside down. The coefficient of sliding friction is known to be 0.300 for this situation. For small objects (such as a bacterium) moving in a denser medium (such as water), the drag force is given by Stokes law. The car is released from rest at a height h = 54.0 m above the ground and slides along a frictionless track. The ride's sign and station all have mythical Indian-style theming. A crate of mass 100.0 kg rests on a rough surface inclined at an angle of37.037.0with the horizontal. P7.79). and, What is the work done by ? An external force is applied to the top block at an anglewith the horizontal. AL ONLY changes in potential have meaning,and you must always define a base Given also is that initial velocity is towards the #x# axis only. Qualitative at the best online prices at eBay! The work done by air resistance is negative since the air resistance acts in the opposite direction to the displacement. Experts are tested by Chegg as specialists in their subject area. Given: radius of circular motion = R = 18 m weight of passengers = w apparent weight of passengers = N = 50%w Asked: Example 3: In this rollercoaster question, the track is older, so the 15 kg cart experiences an average frictional force of 50 N while on the track. IfF=10NF=10NandM=1.0kgM=1.0kg, what is the tension in the connecting string? (c) What is her acceleration assuming she is already moving in the direction ofFtot?Ftot? Find the following. Find the net force on the helicopter att=3.0s.t=3.0s. The path of the coaster from its initial point shown in the figure to point B involves only up-and-down motion (as seen by the riders), with no motion to the left or right. v^2 = 2 (9.81)(40) 15.0 V Mass cannot be divided out of this equation because it does not appear in all terms. What is the magnitude and direction. WebA child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 7.00 m. At point A the speed of the car is 10.0 m/s, and at point B, the speed is 10.5 m/s. To do this, he lowers his body 0.300 m and then accelerates through this distance by forcefully straightening his legs. In which types of motion would each of these expressions be more applicable than the other one? N D) 908 N Calculate the velocity a spherical rain drop would achieve falling from 5.00 km (a) in the absence of air drag (b) with air drag. At the start of the problem, the roller-coaster is at the top of the hill at Point A. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Ifb=0.750,b=0.750,and the mass of the skydiver is 82.0 kg, first set up differential equations for the velocity and the position, and then find: (a) the speed of the skydiver when the parachute opens, (b) the distance fallen before the parachute opens, (c) the terminal velocity after the parachute opens (find the limiting velocity), and (d) the time the skydiver is in the air after the parachute opens. The cars have become heavier over the past 20 years 250 pF has a charge of magnitude 0.146 C on, Q:d) What is the magnitude and direction of Vem i? frictionless 5.0 incline whose vertical, Q:Two blocks, M and M2, are connected by a massless string Venus takes, Q:A particular gasoline tank can hold 48.5 kg of gasoline when full. A box rests on the (horizontal) back of a truck. A boater and motor boat are at rest on a lake. In Earths frame of reference, there is no centrifugal force pulling the mass away from the center of rotation, yet there is a force stretching the string attaching the mass to the nail. it is also assumed that there is no loss of energy due to air friction. Provide Feedback A block of mass m = 2.50 kg is pushed a distance d = 2.20 m along a frictionless, horizontal table by a constant applied force of magnitude F = 16.0 N directed at ail angle = 25 below the horizontal as shown in Figure P7.5. Rolling friction for trains is small, and consequently, trains are very energy-efficient transportation systems. If each block has an acceleration of2.0m/s22.0m/s2to the right, what is the magnitudeFof the applied force?