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March 31, 2015

Homework Help: physics 3!! **

Posted by kelsey on Monday, October 6, 2008 at 5:09am.

A man lifts a 3 kg crate from the floor to a shelf (2 m high) at constant speed*.
What was the change in KE of the crate?
What is the change in the PE of the crate?
If it takes 2 s for the man to lift the crate to the shelf, find the man's power output.

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