University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 10.12E
CP A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley, similar to what is shown in fig. 10.10. The pulley is a uniform disk with mass 10.0 kg and radius 30.0 cm and turns on frictionless bearings. You measure that the stone travels 12.6 m in the first 3.00 s starting from rest. Find (a) the mass of the stone and (b) the tension in the wire.
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A stone is suspended from the free end of a wire that is wrapped around the outer rim of a pulley. The pulley is a uniform disk with mass 10.0 kg and radius 30.0 cm and turns on frictionless bearings. You measure that the stone travels 12.6 m in the first 3.00 s starting from rest. Find (a) the mass of the stone and (b) the tension in the wire.
An 800-gram grinding wheel 22.5 cm in diameter is in the shape of a uniform solid disk. (We can ignore the small hole at the center.) When it is in use, it turns at a constant 250 rpm about an axle perpendicular to its face through its center. When the power switch is turned off, you observe that the wheel stops in 47.0 ss with constant angular acceleration due to friction at the axle. What torque does friction exert while this wheel is slowing down?
A metal hoop with 0.15 kg of mass and 0.080 m of radius rolled without slipping on a
horizontal floor. A ramp was placed on the floor. The hoop rolled up the incline
without slipping to a vertical height of 0.39 m before stopping. The ramp has a
length of 1.7 m along the incline. Find the speed of the hoop before it reached the
ramp.
Hint: the hoop has rotational kinetic energy. The rotational inertia of a ring is mr^2.
Chapter 10 Solutions
University Physics (14th Edition)
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