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July 25, 2014

Homework Help: Physics 203

Posted by Kayla on Wednesday, April 6, 2011 at 11:14am.

A 4 kg block resting on a frictionless horizontal ledge is attached to a string that passes over a pulley and is attached to a hanging 2 kg block. The pulley is a uniform disk of radius 13.0 cm and mass 0.50 kg.

(a) Find the speed of the 2 kg block after it falls from rest a distance of 2.5 m.

(b) If an additional 5.0 mJ of energy are supplied to the rotational energy, what is the new angular speed of the ball?

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