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April 1, 2015

Homework Help: Physics. PLEASE HELP!!

Posted by Amber on Saturday, April 7, 2012 at 8:40pm.

A 1.3 kg steel ball and 8 m cord of negligi-ble mass make up a simple pendulum that can pivot without friction about the point O.
This pendulum is released from rest in a horizontal position and when the ball is at its lowest point it strikes a 1.3 kg block sitting
at rest on a shelf. Assume that the collision is perfectly elastic and take the coefficient of friction between the block and shelf to be 0.89.
The acceleration of gravity is 9.81 m/s2. What is the velocity of the block just after impact?
Answer in units of m/s

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