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An elaborate pulley consists of four identical balls at

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 18DQ Chapter 9

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 18DQ

An elaborate pulley consists of four identical balls at the ends of spokes extending out from a rotating drum (?Fig. Q9.18?). A box is connected to a light, thin rope wound around the rim of the drum. When it is released from rest, the box acquires a speed V after having fallen a distance d. Now the four balls are moved inward closer to the drum, and the box is again released from rest. After it has fallen a distance d, will its speed be equal to V, greater than V, or less than V? Show or explain why.

Step-by-Step Solution:

Solution 18DQ Step 1 of 4: This problem can be solved using the law of conservation of energy; That is Loss in potential energy of box = rotational KE of drum + translational Kinetic energy of box M g h = 1 Mv + I 1 2 2 2 v Using h = d and = r M g d= 1 Mv + I( ) v 2 2 2 r Step 2 of 4: Solving for v, 2M g d= Mv +I( )2 v 2 r 2 I v (M + r )=2M g d v = 2M g d (M +r )

Step 3 of 4

Chapter 9, Problem 18DQ is Solved
Step 4 of 4

Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

This textbook survival guide was created for the textbook: University Physics, edition: 13. This full solution covers the following key subjects: box, drum, released, balls, Rest. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. University Physics was written by and is associated to the ISBN: 9780321675460. The answer to “An elaborate pulley consists of four identical balls at the ends of spokes extending out from a rotating drum (?Fig. Q9.18?). A box is connected to a light, thin rope wound around the rim of the drum. When it is released from rest, the box acquires a speed V after having fallen a distance d. Now the four balls are moved inward closer to the drum, and the box is again released from rest. After it has fallen a distance d, will its speed be equal to V, greater than V, or less than V? Show or explain why.” is broken down into a number of easy to follow steps, and 99 words. The full step-by-step solution to problem: 18DQ from chapter: 9 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. Since the solution to 18DQ from 9 chapter was answered, more than 564 students have viewed the full step-by-step answer.

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