February 25, 2017

Homework Help: Physics

Posted by James on Wednesday, March 18, 2009 at 11:29pm.

The hockey captain, a physics major, decides to measure the speed of the hockey puck, He loads a small styrofoam chest with sand, giving it a total mass of 6.4 kg. He places the chest and embeds itslef in the styrofoam. The chest moves off at 1.2 m/s. What was the puck's speed?

I know that the speed is 49m/s.

What was the kinetic energy of the puck before it hit the styrofoam? Not sure how to do this?

What was the kinetic enry of the chest with the puck in it after they moved away. Not sure how to do this?

How much mechanical energy was lost in this ellastic collision? Not sure how to do this either?

Any help on these would be greatly appreciated.

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