Question

It is not always possible that momentum is in uniform motion like a tennis player hits a ball with racket but may be ball is in non uniform motion so why do we use “v” in momentum’s formula because velocity is always in uniform

Answer 1

momentum = m*v
here m= mass of the object, and v= velocity of the object
so when a tennis player hits a ball with a racket. racket hits the ball and ball gains a velocity v just after hitting.
this starting velocity v is used for the momentum of the ball. the ball can have non-uniform motion after it does not matter.
we take the velocity of ball v just after rocket hits the ball to find the momentum of the ball.
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