Question

2. Suppose a ball of mass m is thrown vertically up with a initial speed its speed decreases continuously till it becomes zero. Thereafter the ball begins to fall down and attains the speed v again before striking the ground. It implies that the magnitude of initial momentum and final momentum of the ball are the same. Yet it is not an example for the law of conservation of momentum, explain why?

Answer 1

This is due to the gravitational force of earth because u can see the change in velocity due to the external force.


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