Atennis ball of mass 57 g travels with velocity < 70, 0, 0 > m/s toward a wall. after bouncing off the wall, the tennis ball is observed to be traveling with velocity < -65, 0, 0 > m/s. -what is the magnitude of the change of momentum of the tennis ball? -what is the change in the magnitude of the tennis ball's momentum? explain

1) The magnitude of change in momentum is 7.695 kgm/s.

Explanation:

We know that momentum of a particle with mass 'm' travelling with a speed of 'u' is mathematically given by

Thus according to the given values initial momentum of the ball is

The final momentum of the ball after bouncing off becomes

Thus the change in momentum is given by:

Thus the magnitude of change in momentum is 7.695 kgm/s.

okay i have so many questions. but the big one here is: um wt..f is this mess? ?