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Office Use Quiz 3 Physics 7B(D) Winter 2011 February 17, 2011 1. Quick Question (2 points) A small car and a huge truck are moving at the same speed and collide head on becoming a single large pile of twisted metal. In the collision which one (the truck or the car if either) has experienced a larger change in momentum? Give your answer and a short explanation as to why it is true. Glow art -> Apt so
-*car ofrna +ruck MüSi ttedn'tha FOWL CM? iA 04DYAIJAkthii, 2. (8 points)Dr. C. is snowboarding at a constant speed of 4 m/s due east, when a Physics 7B student throws a huge snowball at him, striking him on his back. All the snow sticks to Dr. C. Dr. C has a mass of 85 kg, the snow ball has a mass of 8 kg and is travelling at 15 m/s. a.(6 pts.) What is Dr. C's new velocity (assume he does not fall)? Show all your work and explain your physics. al • wo • vr-cvii a47 Rift' K n 5 79) lit— verrni
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easd. n b. (2 pts.) Dr. C. now tosses a 8 kg mass back at the student. What happens to his velocity? Explain (A couple of equations and a sentence or two, but you do not have to do any numerical calculations). dosed stun^ t) , Firm - narth
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