-Only do 5, 6, and 9. Show work. This print-out should have 21 questions. Multip

Question

-Only do 5, 6, and 9. Show work.

This print-out should have 21 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. A 15 kg object and a 16 kg object are connected by a massless compressed spring and rest on a frictionless table. After the spring is released, the object with the smaller mass has a velocity of 10 m/s to the left. What is the velocity of the object with the larger mass? Answer in units of m/s A 61.9 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 11.0 kg oxygen tank in a direction away from the shuttle with a speed of 10.5 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut starts from rest, find the final speed of the astronaut after throwing the tank. Answer in units of m/s Tony (of mass 75 kg) coasts on his bicycle (of mass 5 kg) at a constant speed of 6 m/s, carrying a 12 kg pack. Tony throws his pack forward, in the direction of his motion, at 4 m/s relative to the speed of bicycle just before the throw. What is the initial moment um of the system (Tony, the bicycle, and the pack)? Answer in units of kg middot m/s What is the momentum of the system immediately after the pack is thrown? Answer in units of kg middot m/s What is the bicycle speed immediately after the throw? Answer in units of m/s A(n) 0.596 kg football is thrown with a speed of 12.5 m/s. A stationary receiver catches the ball and brings it to rest in 0.0249 s. What is the magnitude of the impulse de-livered to the ball? Answer in units of kg middot m/s What is the average force exerted on the receiver? Answer in units of N A 941 kg drag race car accelerates from rest to 111 km/h in 1.16 s. What change in momentum does the force produce? Answer in units of kg middot m/s What average force is exerted on the car? Answer in units of N In a particular crash test, an automobile of mass 1558 kg collides with a wall and bounces back off the wall. The x components of the initial and final speeds of the automobile are 17 m/s and 2.9 m/s, respectively. If the collision lasts for 0.12 s, find the magnitude of the impulse due to the collision. Answer in units of kg middot m/s Calculate the magnitude of the average force exerted on the automobile during the collision. Answer in units of N Each croquet ball in a set has a mass of 0.51 kg. The green ball, traveling at 10.3 m/s, strikes the blue ball, which is at rest. Assuming that the balls slide on a friction- less surface and all collisions are head-on, find the final speed of the blue ball in each of the following situations: The green ball stops moving after it strikes the blue ball. Answer in units of m/s

Explanation / Answer

actual velocity of pack after throw= 6m/s+ 4m/s=10 m/s

by momentum conservation,

intial momentum = final momentum

(75+5+12)* 6 = (75+5)*v + 12*10

v= (552-120)/80 = 5.4 m/s

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