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Unformatted text preview: Physics Honors Chapter 6 Test: Momentum and Impulse version 1 v m p m m = t F p ∆ = ∆ 2f 1f v v m m = sometimes 90 2f 1f = + θ θ sometimes 2f 20 1f 10 v v v v + = + sometimes 2 2 1 mv K = mgh U g = c b a c b a sin sin sin θ θ θ = = Law of Sines θ cos 2 2 2 2 ab b a c + = Law of Cosines A 75g rubber ball moving north at 8 m/s strikes a 50g rubber ball moving south at 5 m/s. 1) If after the collision the 75g ball comes to rest, what is the final velocity of the 50g ball? 2) What is the maximum amount of heat and sound energy that can be produced by this collision? Identical constant net forces act to push two identical masses A and B continuously from a starting line to a finish line. Mass A is initially at rest and mass B is initially moving toward the finish line. Both objects move the same distance while being pushed. 3) Which mass has the larger change in momentum? Explain your answer. A 0.20kg ball is sliding on a frictionless, horizontal surface with a velocity of 2.5 m/s [N] when it elastically collides with a 0.20kg ball that is at rest. After the collision, one ball is moving at 2.25 m/s in a generally northeast direction. 4) What is the velocity of the other ball after the collision? Superman (mass M = 125 kg) is flying north. Lois Lane (mass m = 50 kg) is falling from the top of a tall building. Superman catches Lois, saving her from certain discomfort. Just before Superman grabs Lois, she has a speed of 40 m/s. Afterwards, they both have a speed of 15 m/s. 5) What is Superman’s speed just before he catches Lois? A 1kg block slides down a 5m high frictionless slope. Once it reaches the bottom of the slope, the block moves to the left and strikes a 2kg box that is initially at rest, as shown at right. The collision is completely elastic. 6) What is the velocity of the 1kg block just after the collision? A 1000 kg rocket ship is zooming toward Mars when it turns on its engines. The force exerted by the engine that pushes the rocket ship towards Mars varies with time as shown in the graph at right. After the rocket engines varies with time as shown in the graph at right....
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This note was uploaded on 08/29/2010 for the course PHYS 38234 taught by Professor Ramesh during the Spring '09 term at Berkeley.
 Spring '09
 Ramesh
 Physics, Momentum

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