There is no change in the velocity of the ball after 10 seconds and one hour due to no external force on it.
If a ball floating in outer space was pushed and attain a velocity of 4 m/s, then after 10 seconds as well as after an hour, it has the same velocity because in space there is no forces on the ball. This ball moves with the same velocity until external force is applied on it.
So we can conclude that there is no change in the velocity of the ball after 10 seconds and one hour due to no external force on it.
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