Compute all parts of following problem:
Problem: A 1.1 kg ball drops vertically onto a floor, hitting with a speed of 31 m/s. It rebounds with an initial speed of 11 m/s.
Part A: What impulse acts on the ball during the contact?
Part B: If the ball is in contact with the floor for 0.00850 s, what is the magnitude of the average force on the floor from the ball?
I need help to find the magnitude of the average force on the floor from the ball.