You are jumping on a trampoline and it occurs to you that energy is being transferred as you bounce. like your usual thoughts, doesn't it? ) you realize that sometimes you do work on the trampoline and sometimes it does work on you. the time when you do work on the trampoline is(a) whenever you are touching its surface. (b) when you are touching its surface and that surface is moving downward. (c) when you are touching its surface and that surface is moving upward. (d) during the second half of the trampoline's movement downward and the first half of the trampoline's movement upward.
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Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.
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Which of the following forces require physical contact? tension air resistance friction magnetic force applied force
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You are jumping on a trampoline and it occurs to you that energy is being transferred as you bounce....
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