PEARSON ETEXT ENGINEERING MECH & STATS
15th Edition
ISBN: 9780137514724
Author: HIBBELER
Publisher: PEARSON
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Chapter 19, Problem 48P
To determine
The velocity of the block immediately after the collision.
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A 1-lb ball A is traveling horizontally at 20 ft/s when it strikes a 10-lb block B that is at rest. If the coefficient of restitution between A and B is e = 0.6, and the coefficient of kinetic friction between the plane and the block is Uk = 0.4, determine the time for the block B to stop sliding.
6. A 1-lb ball A is traveing horizontally at 20 ft/s when it strikes a 10-lb block B that is at rest. If the
coefficient of restitution between A and B is e - 0.6. and the coefficient of kinetic friction
between the plane and the block is a = 0.4, determine the time for the block B to stop sliding.
A 100 kg body moves to the right at 5 m/s and another body of mass of W moves to the left at 3 m/s. they meet each other and after impact, the 100 kg body rebounds to the left at 2 m/s. Determine the mass of the other body if the coefficient of restitution is 0.50.
Chapter 19 Solutions
PEARSON ETEXT ENGINEERING MECH & STATS
Ch. 19 - The 60-kg wheel has a radius of gyration about its...Ch. 19 - Prob. 2FPCh. 19 - Prob. 3FPCh. 19 - Gears A and B of mass 10 kg and 50 kg have radii...Ch. 19 - The 50-kg spool is subjected to a horizontal force...Ch. 19 - Prob. 6FPCh. 19 - The rigid body (slab) has a mass m and rotates...Ch. 19 - Prob. 2PCh. 19 - Show that if a slab is rotating about a fixed axis...Ch. 19 - Prob. 21P
Ch. 19 - The two gears A and B have weights and radii of...Ch. 19 - The 30-kg gear is subjected to a force of P =...Ch. 19 - Prob. 27PCh. 19 - The turntable T of a record player has a mass of...Ch. 19 - The 10-g bullet having a velocity of 800 m/s is...Ch. 19 - Prob. 31PCh. 19 - Disk A has a weight of 20 lb. An inextensible...Ch. 19 - The 12-kg rod AB is pinned to the 40-kg disk. If...Ch. 19 - A thin rod of mass m has an angular velocity o...Ch. 19 - Prob. 41PCh. 19 - Prob. 42PCh. 19 - Prob. 44PCh. 19 - The 10-lb block is sliding on the smooth surface...Ch. 19 - Prob. 46PCh. 19 - The pendulum consists of a 15-kg solid ball and...Ch. 19 - Prob. 48PCh. 19 - The 20-kg disk strikes the step Without...Ch. 19 - The solid ball of mass m is dropped with a...Ch. 19 - Prob. 54PCh. 19 - Prob. 55PCh. 19 - Prob. 56PCh. 19 - Prob. 58PCh. 19 - The cable is subjected to a force of P = (10t2)...Ch. 19 - Prob. 2RPCh. 19 - The tire has a mass of 9 kg and a rad1us of...Ch. 19 - Prob. 4RPCh. 19 - The spool has a weight of 30 lb and a radius of...Ch. 19 - Prob. 6RPCh. 19 - Prob. 7RPCh. 19 - Prob. 8RP
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- An engineer is studying the impacts of frontal car collisions on the occupants.If a 1900-lb car with velocity vA = 30 mph collides head on with a 2800-lb car with velocity vB =20 mph, the coefficient of restitution of the impact is e = 0.15, and the duration of the collision is0.22 seconds, then determine the magnitude of the average acceleration to which the occupants ofeach car are subjected. Assume car A and car B are on a flat surface, with car A traveling to theright and car B traveling to the left. answer should be in ft/s^2arrow_forwardAn engineer is studying the impacts of frontal car collisions on the occupants.If a 1900-lb car with velocity vA = 30 mph collides head on with a 2800-lb car with velocity vb =20 mph, the coefficient of restitution of the impact is e = 0.15, and the duration of the collision is0.22 seconds, then determine the magnitude of the average acceleration to which the occupants ofeach car are subjected. Assume car A and car B are on a flat surface, with car A traveling to theright and car B traveling to the leftarrow_forwardThe 9.0 kg sphere A is held at an angle of 60° as shown, and then is released from rest and hits the B sphere which has a mass of 4.5 kg. In this crash the coefficient of restitution is e = 0.75. The sphere B is attached to the end of a rod lightweight rotating around the O point. The spring is initially non elongated and it is known that the maximum angle θ that the rod turned after the crash measured from the initial position was of 21.4º. Calculate: a) The speed with which sphere A impacts with sphere B. b) The magnitude and direction of the velocities of each sphere A and B after impact. c) The mechanical energy dissipated on impact. d) The spring stiffness constant k.arrow_forward
- 2. Disk A has a mass of 350 g and is sliding on a smooth horizontal surface with an initial velocity (VA)I= 4 m/s. It makes a direct collision with disk B, which has a mass of 155 g and is originally at rest. If both disks are of the same size and the coefficient of restitution is 0.70, determine the velocity of each disk just after collision.arrow_forwardThe 1-1b ball A is thrown so that when it strikes the 10-1b block B it is traveling horizontally at v = 30 ft/s as shown in (Figure 1). Figure A B 1 of 1 Part A If the coefficient of restitution between A and B is e = 0.6, and the coefficent of kinetic friction between the plane and the block is μ = 0.4, determine the distance block B slides on the plane before stopping. Express your answer in feet to three significant figures. VE ΑΣΦ ↓↑ vec S = Submit Previous Answers Request Answer ? ftarrow_forward3. The pile P has a mass of 800kg and is being driven into loose sand using the hammer C which is dropped 0.5m from the top of the pile. Determine the required mass of the hammer to drive the pile into the sand by 34.8mm after one blow if the sand offers a frictional resistance against the pile of 18kN. The coefficient of restitution between the hammer and the pile is e = 0.1. Neglect the impulses due to the weights of the pile and hammer and the impulse due to the sand during the impact. 0.5 marrow_forward
- A 23-lb sphere A is held at the 60° angle shown and released. It strikes the 8-lb sphere B. The coefficient of restitution for this collision is e=0.60. Sphere B is attached to the end of a light rod that pivots freely about point O. If the spring of constant k = 89 lb/ft is initially unstretched, determine the maximum rotation angle of the light rod after impact. Answer: 0- 19" 60 29"- 29"arrow_forwardThe 6-Mg truck and 3-Mg car are traveling with the free-rolling velocities of 37 km/h and 19 km/h, respectively, just before they collide. After the collision, the car moves with a velocity of 15 km/h to the right relative to the truck. Determine the coefficient of restitution between the truck and car.arrow_forwardThe 12-1b collar B is at rest, and when it is in the position shown the spring is unstretched. Another 2-1b collar A strikes it so that B slides 4 ft on the smooth rod before momentarily stopping. The coefficient of restitution between A and B is e = 0.4. (Figure 1) Figure k = 20 lb/ft? A B 3 ft Part A Determine the velocity of A just after impact measured to the left. Express your answer to three significant figures and include the appropriate units. Enter positive value if the velocity is directed to the left and negative value if the velocity is directed to the right. (VA)2 = Submit Part B F = Value μA Request Answer μА Determine the average force exerted between A and B during the impact if the impact occurs in 0.004 s. Express your answer to three significant figures and include the appropriate units. Value Units Units ? ?arrow_forward
- An engineer is studying the impacts of frontal car collisions on the occupants.If a 1900-lb car with velocity vA = 30 mph collides head on with a 2800-lb car with velocity vb =20 mph, the coefficient of restitution of the impact is e = 0.15, then determine the velocities ofeach car after the collision. Assume car A and car B are on a flat surface, with car A traveling tothe right and car B traveling to the left.arrow_forwardThe 2.8-kg collar is released from rest at A and slides down the inclined fixed rod in the vertical plane. The coefficient of kinetic friction is 0.62. Calculate (a) the velocity v of the collar as it strikes the spring and (b) the maximum deflection x of the spring. 2.8 kg 0.68 m H=0.62 59 Answers: (a) v = (b) x = i i k = 3.4 kN/m m/s mmarrow_forwardThe 2.5-kg collar is released from rest at A and slides down the inclined foxed rod in the vertical plane. The coefficient of kinetic friction is 0.61. Calculate (a) the velocity v of the collar as it strikes the spring and (b) the maximum deflection of the spring 2.5 kg -0.61 Answers: 65 9- 65 0.62 m k-1.4 kN/m m/arrow_forward
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