Arock that forms when magma hardens beneath the earth's surface is called

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

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