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Unformatted text preview: February 22, 2008 PHY2053 Discussion Quiz 5 (Chapter 5.3 -5.7) Name: UFID: ***1. (5 pts) A block starts from rest and slides 2.00 m down a 30.0 incline and then slides some distance on a horizontal surface before coming to rest. The incline and the horizontal surface have the same coefficient of kinetic friction against the block. Now suppose we want to send the block back from its final position to its initial position. What initial velocity we need to give the block? First we apply the work-energy theorem to the motion of the block which slides down the incline and comes to rest on the horizontal surface. We solve it for the horizontal distance x:-mgcos L-mgx = -mgsin L (L = 2m) x = (Lsin -Lcos )/ We need to give the initial velocity to the block so that it stops at the original position. We need to give the initial velocity to the block so that it stops at the original position....
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This note was uploaded on 12/13/2011 for the course PHY 2053 taught by Professor Buchler during the Fall '06 term at University of Florida.
- Fall '06