Dynamics HW5 Solutions

Dynamics HW5 Solutions - Problem 5-1: Suppose that you...

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Problem 5-1: Suppose that you investigate an accident in which a 3000-lb car A struck a parked 2200-lb car B . All four of the car B ’s wheels were locked, and skid marks indicate that it slid 18 ft after the impact. If you estimate that the coefficient of kinetic friction between B ’s tires and the road to be 0.7 k µ = , and the coefficient of restitution of the impact to be 0.25 e = , what was A ’s velocity ( A v ) just before the impact? Assume that only one impact occurred.
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Problem 5-2: A ball of mass m = 2 kg is released from rest at a height of 1 h = m and drops vertically onto an inclined surface with 30 θ = o , as shown in the diagram. The coefficient of restitution for the ball and the surface is 0.9 e = . Determine the velocity of the ball after the impact and the amount of energy lost during the impact.
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The 5 kg block B is dropped from a height h = 3m onto the 15 kg pan P of a spring scale, as illustrated below. Assume that the impact is perfectly plastic and the
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This note was uploaded on 04/03/2008 for the course EAS 208 taught by Professor Mehdiahmadizadeh during the Spring '08 term at SUNY Buffalo.

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Dynamics HW5 Solutions - Problem 5-1: Suppose that you...

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