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Unformatted text preview: that work done by a force is given by the area under the force vs position graph, with signs included.) This means the kinetic energy increases first and then decreases to the original value. Thus the kinetic energy of the body is always larger than 14.4 J. In the region between x = 2 m and 5 m, the kinetic energy of the body is expresses as K = 14.4 + (-F s )(x - 2) Setting the energy to be 10 J, and we solve the equation for x. 10 = 14.4 – F s (x – 2) ⇒ x = (14.4 – 10)/F s + 2 = 3.1 m b) What is the maximum kinetic energy of the body between x = 0 and x = 5.00 m? The kinetic energy of the body increases between x = 0 and 1 m and then decreases. Therefore, the kinetic energy takes the maximum value at x = 1 m. The maximum energy is K max = K (x = 1 m) = K i + (1/2)F s ×1 = 16.4 J...
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This note was uploaded on 01/25/2011 for the course PHY 2048 taught by Professor Field during the Summer '08 term at University of Florida.
- Summer '08