chap9 - Linear Momentum and Collisions Linear Momentum and...

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1 Linear Momentum and Collisions Linear Momentum and Its Conservation
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2 Linear Momentum Conservation (continued) Two objects have the same kinetic energy. How do the magnitudes of their momenta compare? 1 2 3 4 23 94 4 0 1. p 1 = p 2 2. p 1 < p 2 3. p 1 > p 2 4. Not enough information to tell
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3 A car and a truck travelling at the same speed are in a head-on collision, and stick together. Which vehicle experiences a larger change in the magnitude of momentum? 1 2 3 4 70 2 50 5 1. The car 2. The truck 3. They have the same change in the magnitude of p 4. Not enough information to tell A friend throws a baseball to you, and you catch it. Then (s)he throws a medicine ball (several kg) to you. Which is easier to catch: 1 2 3 4 1 5 60 68 1. A medicine ball thrown at the same speed as the baseball 2. A medicine ball thrown at the same momentum as the baseball 3. A medicine ball thrown at the same kinetic energy as the baseball 4. I don’t know – I’d duck anyways!
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4 Impulse and Momentum Example • Car mass 1500 kg, duration of collision 0.150 s; What are impulse and average force?
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5 Which of the following is the probable ranking (greatest to least) in the impulse of an automobile dashboard, a seatbelt, and an airbag? 1
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chap9 - Linear Momentum and Collisions Linear Momentum and...

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