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Q. A 5.00 kg object, object A, moving at 5.50m/s to the right collides head on with a 3.5 kg object, object B, that is a rest. The 5.0 kg object ends up with the speed of 1.5 m/s in the opposite direction. (1) What is velocity of the two objects after collision? (2) How much kinetic energy is transferred to object B through the collision?

Q. A girl on a sled coasts down a hill. Her speed is 7.60 m/s when she reaches level ground at the bottom. The coefficient of kinetic friction between sled's runners and the hard, icy snow is 0.04, and the girl and sled together weigh 644N. How far does the sled travel on the level ground before coming to rest?

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