1.A body moving along a circular path has ………………..

2.A ball strikes the floor vertically with a velocity `u’ and rebounds at the same speed. The change in speed would be ……………

3.The acceleration of a body projected upwards with a certain velocity is …………………

4.The ball is thrown up with certain velocity. It attains a height of 30m and comes back to the thrower. Then the ………………

5.Nkg¯¹ is the unit of ……………….