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November 22, 2014

Homework Help: Physics

Posted by Einstein on Friday, November 16, 2007 at 5:26pm.

A 20.0 kg cart is moving with a velocity of 7.30 m/s down a level hallway. A constant force of -11.0 N acts on the cart and its velocity becomes 3.50 m/s. a) What is the change in kinetic energy of the cart? b) How much work was done on the cart? c) How far did the cart move while the force acted?

My thoughts: KE = 1/2mv^2. The mass would be 20.0 kg. How would you find the change in kinetic energy?

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