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Q1. A 4.30g lead bullet travelling at 370m/s is stopped by a large tree. If half the kinetic energy of bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in temperature of bullet?

Q2. Now suppose that the two masses continue to move at the speed from Part A until they encounter a rough surface. The coefficient of friction between the masses and the surface is . If the blocks come to rest after a distance, which of following equations would you use to find?

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