Question

If two balls collide in air while moving vertically, then momentum of the system is consversed because​

Answer 1

Almost in every book on physics, there's an example of conservation of momentum when the ball that is moving horizontally in the air, hits some massive wall. They claim that the return speed of the ball when it bounces off is the same as it was before the hit. If there were no external forces acting on the system (or their net force was zero) that would be fine. But in this case, there is a gravitational force acting on the ball, and because there is no surface underneath it, there's no normal force and therefore it doesn't "cancel out" the gravitational force. So my question is, why they say that the momentum conserved? Do they neglect the gravitational force or what? I'm quite confused.

Answer 2

HIII....

GOOD MORNING:-)

HERE IS YOUR ANSWER:--------

THIS IS BECAUSE FORCE OF GRAVITY IS VERY LESS COMPARED TO THE IMPULSIVE FORCE.

HOPE THIS HELPS YOU.....