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When you drop a pebble from height a it reaches the ground with speed v if there is no air resistance. from what height should you drop it so it will reach the ground with three times the speed? (a) 9m (b) 3m (c) 6m (d) 18m
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Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity
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While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank
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Compare and contrast static, sliding, and rolling friction....
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