PHYSICS F./SCI... W/MOD V.II W/KIT
4th Edition
ISBN: 9780134819884
Author: GIANCOLI
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 57P
(III) Suppose two boxes on a frictionless table are connected by a heavy cord of mass 1.0 kg. Calculate the acceleration of each box and the tension at each end of the cord, using the free-body diagrams shown in Fig. 4–49. Assume FP = 35.0 N, and ignore sagging of the cord. Compare your results to Example 4–12 and Fig. 4–22.
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(I) A box weighing 77.0 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. 4–45). 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.
FIGURE 4-45
Problem 20.
(II) Figure 4–53 shows a block (mass ma) on a smooth hori-
zontal surface, connected by a thin cord that passes over
a pulley to a second block (mB), which hangs vertically.
(a) Draw a free-body diagram for each block, showing the
force of gravity on each, the force (tension) exerted by the
cord, and any normal force. (b) Apply Newton's second law
to find formulas for the acceleration of the system and for
the tension in the cord. Ignore friction and the masses of
the pulley and cord.
FIGURE 4–53
Problems 32 and 33.
mB
Mass ma rests on a
smooth horizontal
surface; mâ hangs
vertically.
A stone hangs by a fine thread from the ceiling, and a
section of the same thread dangles from the bottom of
the stone (Fig. 4–36). If a person gives a sharp pull on the
dangling thread, where is the thread likely to break:
below the stone or above it? What if the person gives a
slow and steady pull? Explain your answers.
FIGURE 4-36
Question 9.
Chapter 4 Solutions
PHYSICS F./SCI... W/MOD V.II W/KIT
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