Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Textbook Question
Chapter 10, Problem 67P
(II) Two masses, mA = 35.0 kg and mB = 38.0 kg, are connected by a rope that hangs over a pulley (as in Fig. 10–59). The pulley is a uniform cylinder of radius 0.381 m and mass 3.1 kg. Initially mA is on the ground and mB rests 2.5 m above the ground. If the system is released, use conservation of energy to determine the speed of mB just before it strikes the ground. Assume the pulley bearing is frictionless.
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(II) Two masses, mA = 35.0 kg and mB = 38.0 kg, are
connected by a rope that hangs
over a pulley (as in Fig. 10-59).
The pulley is a uniform cylinder of
radius 0.381 m and mass 3.1 kg.
Initially ma is on the ground and
mB rests 2.5 m above the ground.
If the system is released, use
conservation of energy to deter-
mine the speed of mB just before
it strikes the ground. Assume the
pulley bearing is frictionless.
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mB
mA
2.5 m
FIGURE 10-59
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Problem 67.
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(IID) A.
- (II) Two masses, m.
nected by a rope that hangs over a pulley (as in Fig. 8–54).
The pulley is a uniform cylinder of radius R = 0.311 m
and mass 3.1 kg. Initially ma is on
the ground and mg rests 2.5 m
above the ground. If the system
is released, use conservation of
energy to determine the speed
of mg just before it strikes the
ground. Assume the pulley bearing
32.0 kg and mg = 38.0 kg, are con-
R
is frictionless.
mB
2.5 m
FIGURE 8-54
Problem 58.
(II) A rotating uniform cylindrical platform of mass 220 kg and radius 5.5 m slows down from 3.8 rev/s to rest in 16 s when the driving motor is disconnected. Estimate the power output of the motor (hp) required to maintain a steady speed of 3.8 rev/s.
Chapter 10 Solutions
Physics for Scientists and Engineers with Modern Physics
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