Posted by **Katherine** on Friday, October 9, 2009 at 6:34pm.

The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down to 4.0 m/s and then collides straight-on with a second billiard ball of equal mass. The first billiard ball completely stops and the second one rolls away with a velocity of 4.0 m/s. Assume the first billiard ball is the system

How do I calculate work for a problem like this? I know how to calculate kinetic energy, but this question is asking for q and w.

Could someone please explain the steps it would take to answer a problem like this? Thank you.

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