(c) The energy that appears as kinetic energy is originally in the form of potential energy in the compressed spring. Thus,KUkximax==122, where kis the spring constant and xis the compression. Thus, xKk=2267640046..JNmmbg55. (a) The vertical forces acting on the block are the normal force, upward, and the force of gravity, downward. Since the vertical component of the block's acceleration is zero, Newton's second law requires FN= mg, where mis the mass of the block. Thus f= μkFN=kmg. The increase in thermal energy is given by
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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.