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Unformatted text preview: 2004 Test Physics Honors Chapter 6 Test: Momentum and Impulse Form 1 p mv = v v p F t ∆ = ∆ v v f N F F μ = cos W Fd θ = 1f 2f 90 θ θ = o sometimes 1o 1f 2o 2f v v v v + = + v v v v sometimes 1f 2f v v = v v sometimes 2 1 2 K mv = g U mgh = 2 1 Δ 2 e U k x = sin sin sin a b c a b c θ θ θ = = Law of Sines 2 2 2 2 cos c a b ab θ = + Law of Cosines A 0.1 kg dart is thrown at a 2.0 kg block of wood that rests on a flat, rough surface. The initial velocity of the dart is 30 m/s [W]. The dart sticks in the block, and the dart and block together slide a distance of 50 cm before coming to rest. 1) If the dart accelerates for 0.015 s after it strikes the block, what average force acts on the dart? 2) What is the coefficient of kinetic friction between the block and the surface? A 0.20kg ball is sliding on a frictionless, horizontal surface with a velocity of 2.5 m/s [S] 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. 3) What is the velocity of the other ball after the collision? Superman (mass m = 125 kg) is flying north at 10.0 m/s. Lois Lane (mass m = 50 kg) is falling from the top of a tall building. Superman catches Lois when she has a speed of 40 m/s. 4) What is Superman’s velocity just after he catches Lois? A 75g rubber ball moving north at 8 m/s strikes a 50g rubber ball moving south at 5 m/s. 5) After the collision, what is the maximum velocity of the 50g ball? 6) If after the collision the 75g ball comes to rest, what impulse acts on the 50g ball? 7) If after the collision the 75g ball comes to rest, what is the final velocity of the 50g ball? 8) What is the maximum amount of heat and sound energy that can be produced by this collision? A 10g block sliding due west at 2.0 m/s collides with a stationary 8.0g block on a frictionless surface. The two dimensional collision converts 20% of the 10g block’s energy into heat and sound. After the collision, the 10g block is sliding at 1.50 m/s. 9) What is the final velocity of the 8g block? 2005 Test Physics Honors Chapter 6 Test: Momentum and Impulse version 1 sometimes sometimes sometimes Law of Sines Law of Cosines A 0.1 kg dart is thrown at a dartboard with an initial velocity of 10 m/s [W]. It accelerates for 0.015 s as it comes to a stop in the dartboard. 1) What impulse acts on the dart? A 0.20kg ball is sliding on a frictionless, horizontal surface with a velocity of 2.5 m/s [S] when it elastically collides with a 0.20 kg ball that is at rest. After the collision, one ball is moving at 2.15 m/s in a generally southeast direction....
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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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