answer the following questions- 1) why is it advised that an athlete should jump on a cushion bed and not on a hard floor? 2)why does a gun recoil when a bullet is fired from it? A gun of mass 4kg fires a bullet of mass 75g at a velocity of 400m/s. Find the recoil velocity of the gun. 3) A body when dropped from a high rise building, it comes down very quickly and hits the earth's surface. Does the Earth also gets displaced towards the body? is the newton's third law valid here? elaborate the phenomenon.
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sorry it's tooo long do on your own
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