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# homework4 - ME 104: Homework 4 Prof. Karl J. Hedrick:...

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ME 104: Homework 4 Prof. Karl J. Hedrick: University of California, Berkeley Due Monday, October 5th

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Chapter 13, Problem 160 Three steel spheres of equal weight are suspended from the ceiling by cords of equal length which are spaced at a distance slightly greater than the diameter of the spheres. After being pulled back and released, sphere A hits sphere B , which then hits sphere C . Denoting by e the coefficient of restitution between the spheres and by 0 v the velocity of A just before it hits B , determine ( a ) the velocities of A and B immediately after the first collision, ( b ) the velocities of B and C immediately after the second collision. ( c ) Assuming now that n spheres are suspended from the ceiling and that the first sphere is pulled back and released as described above, determine the velocity of the last sphere after it is hit for the first time. ( d ) Use the result of Part c to obtain the velocity of the last sphere when 6 n and 0.95. e
A 600-g ball A is moving with a velocity of magnitude 6 m/s when it is hit as shown by a 1-kg ball B , which has a velocity of magnitude 4 m/s. Knowing that the coefficient of restitution is 0.8 and assuming no

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## This note was uploaded on 02/06/2010 for the course ME 104 taught by Professor Oreilly during the Fall '08 term at Berkeley.

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homework4 - ME 104: Homework 4 Prof. Karl J. Hedrick:...

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