29. The reference point for the gravitational potential energy Ug(and height h) is at the block when the spring is maximally compressed. When the block is moving to its highest point, it is first accelerated by the spring; later, it separates from the spring and finally reaches a point where its speed vfis (momentarily) zero. The xaxis is along the incline, pointing uphill (so x0for the initial compression is negative-valued); its origin is at the relaxed position of the spring. We use SI units, so k= 1960 N/m and x0= –0.200 m.
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.