Question

Suppose a ball of mass m is thrown vertically upwards with an initial speed v, its speed decreases continuously till it becomes zero. Therefore, the ball begins to fall downward and attains the speed v again before striking the ground. It implies that the magnitude of initial and final momenta of the ball are same. Yet, it is not an example of conservation of momentum. Explain why​

Answer 1

Answer:

mvf= mvi

Explanation:

The situation does not fit as an example of conservation of momentum bcz the vi at which the ball was moving upwards is not equal to the vf the final velocity of the ball.

So if as the conservation of momentum's law states that

Pf=Pi

mvf=mvi

and if the vf and vi will not be same it will not satisfy the equation. Thus the body will not be the example of conservation of momentum