4_1_1_1_-_Momentum_Concepts

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Mechanics, Heat, and Sound (PHY 302K) Name: ____________________________________ Activity – Momentum Concepts Part 1 1) In a game of billiards, the cue ball strikes the 8-ball and immediately comes to rest. What happens to the cue ball’s momentum? 2) A bulldozer and a Mini Cooper are involved in a head-on collision. Which one experiences a greater force? Which one has a greater impulse? Which one has a greater change in velocity? 3) An astronaut went out for a spacewalk and became stranded some distance away from her space station. All she has with her is her bag of tools. How can she get back to the space station? Explain your answer. 4) Objects on Mars weigh about 38% what they do on Earth. While driving on Earth, a Mars rover moves at a speed of 30 mph. If the rover moves with the same speed on Mars, would it have more, less, or the same momentum as when on Earth? 5) Explain why it feels more forceful when you catch a baseball with your bare hand, as opposed to catching it with a glove. 6) Suppose a student throws a pencil at the wall, and upon hitting the wall, the pencil breaks in half. What happens to the original momentum of the pencil? 7) If you throw a ball horizontally while standing on roller skates, you roll backwards. Will you roll backwards if you go through the motions of throwing the ball, but hold on to it instead? 8) When an apple falls from a tree and strikes the ground without bouncing, what becomes of the momentum? Mechanics, Heat, and Sound (PHY 302K)| 1
Mechanics, Heat, and Sound (PHY 302K) Name: ____________________________________ Part 2 Sketch the results you expect for each of the following collisions. Explain your reasoning for each. For each situation use velocity vectors over each cart to indicate how much velocity each cart has. If a cart will have no velocity write a zero over the cart. 9) Consider a track with two equal mass carts on it as shown. Draw what the situation of the two carts after the collision and explain your reasoning in the space provided. 10) Consider a track with two carts of unequal mass, the cart with mass, m, is moving and the cart with mass, M, is sitting still. Draw what the situation of the two carts after the collision and explain your reasoning in the space provided. 11) Consider the track with two carts of unequal mass, the cart with mass, m, is on the left and the cart with mass, M, is on the right. Draw what the situation of the two carts after the collision and explain your reasoning in the space provided. Mechanics, Heat, and Sound (PHY 302K)| 2
Mechanics, Heat, and Sound (PHY 302K) Name: ___________________________ 12) Consider a track with two equal mass carts on it as shown. Draw what the situation of the two carts after the collision and explain your reasoning in the space provided. Page 3 of 3 EXPERIENCE COLLEGE BEFORE COLLEGE
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