Momentum, Impulse, and a Bouncing ball

Suppose you drop a 200. g rubber ball on the floor from a height of 2.00 m and it
rebounds to a height of 1.50 m. If the force that the floor exerts on the ball has the
shape and duration as shown below, find the maximum value and average value
of .

Use 3 steps:
  1. Find the velocity of the ball immediately before and after contact with the floor.
  2. Use these velocity values to find the momentum of the ball immediately before
    and after contact with the floor.
  3. Calculate the change in momentum and set that equal to the impulse. Solve for
    the maximum value of.