EP PHYSICS: PRIN.APP.AP-MOD.MASTERING
7th Edition
ISBN: 9780137453276
Author: GIANCOLI
Publisher: SAVVAS L
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Chapter 4, Problem 2Q
A box rests on the (frictionless) bed of a truck. The truck driver starts the truck and accelerates forward. The box immediately starts to slide toward the rear of the truck bed. Discuss the motion of the box, in terms of Newton’s laws, as seen (a) by Mary standing on the ground beside the truck, and (b) by Chris who is riding on the truck (Fig.4-35).
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Chapter 4 Solutions
EP PHYSICS: PRIN.APP.AP-MOD.MASTERING
Ch. 4 - A 150-kg football player collides head-on with a...Ch. 4 - A line by the poet T. S. Eliot (from Murder in the...Ch. 4 - Why does a child in a wagon seem to fall backward...Ch. 4 - A box rests on the (frictionless) bed of a truck....Ch. 4 - Prob. 3QCh. 4 - If the acceleration of an object is zero, are no...Ch. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - (a) Why do you push down harder on the pedals of a...
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Problem 21.
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- The 70.0-kg climber in Fig. 4-72 is supported in the “chimney" by the friction forces exerted on his shoes and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.80 and 0.60, respectively. What is the minimum normal force he must exert? Assume the walls are ver- tical and that the static friction forces are both at their maximum. Ignore his grip on the rope. FIGURE 4–72 Problem 89.arrow_forwardA box weighing 66.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end (Fig. 4-37). Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs (a) 30.0 N, (b) 60.0 N, and (c) 90.0 N.arrow_forward14. Figure 5-34 shows three blocks being pushed across a frie- tionless floor by horizontal force F. What total mass is acceler- ated to the right by (a) force F, (b) force F, of block 1 on block 2, and (c) force F of block 2 on block 3? (d) Rank the blocks according to their accelerations, greatest first. (e) Rank forces F, F, and F32 according to their magnitude, greatest first. (Warmup for Problem 40) 10 kg 5 kg 2 kg 3.arrow_forward
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- the masses of the pulley and cord. FIGURE 4-45 Problems 51, 52, and 53. Mass m rests mg on a smooth horizontal surface, mg hangs vertically. $2. (II) (a) If ma = 13.0 kg and mB = 5.0 kg in Fig., 4–45, determine the acceleration of each block. (b) If initially ma is at rest 1.250 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely? (c) If mg = 1.0 kg, how large must ma be if the acceleration of the system is to be kept at 10 g?arrow_forward4-61. The drum has a weight of 500 N and rests on the floor for which the coefficient of static friction is 4, = 0.5. If a = 0.9 m and b= 1.2 m, determine the smallest magnitude of the force P that will cause impending motion of the drum.arrow_forward
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