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Exam3S06a

Exam3S06a - 1 Two carts are on a frictionless and...

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1. Two carts are on a frictionless and horizontal air track, with the + x -direction to the right as shown. Cart A1 x A2 x A has an initial velocity v = 9.00 m/s and a final velocity of v , while cart B is initially stationary. The A B mass of cart A is one-fifth that of cart B, m = m /5. For parts a) and b) the collision is completely inelastic, while for parts c) and d) the collision is elastic. A2 x a) Find v for the completely inelastic collision. 1.50 m/s b) What percentage of the initial kinetic energy is lost during this completely inelastic collision? 83.3 % A2 x c) Find v for the elastic collision. ! 6.00 m/s d) Now assume that the elastic collision is caused by a rubber band between the carts that has a spring A A constant k = 15,000 m (N/m), where m is the mass of cart A. Determine the maximum compression of the rubber band during the elastic collision. 0.0671 m

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2. Fill in the blank with the most appropriate answer to the following questions. a) A bullet of mass 5.00 g traveling horizontally with a speed of 420 m/s, is fired into a wooden block with mass of 0.620 kg that is initially at rest on a level surface. The bullet passes through the block and emerges with its speed reduced to 320 m/s. The block slides a distance of 25.0 cm along the surface from
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