Change in the magnitude of the ball's momentum.

[superjen]

A 204g ball falls vertically downward, hitting the floor with a speed of 2.57 m/s and rebounding upward with a speed of 2.10 m/s. Calculate the magnitude of the change in the ball's momentum.
Answer: 9.53E-01 kg*m/s


Calculate the change in the magnitude of the ball's momentum.

i really don't know how to go about the the second question. Any help? or tips?

 

[rl.bhat]

If you want to find the change in momentum taking into consideration the magnitude and direction what will be the answer?