A 4kg mass is initially moving in the x direction at 5 m/s. A force in the positive x-direction acts on the mass for 7 seconds as follows:

a. The force grows linearly from 0N to 8N in 2 seconds.

b. The force stays constant at 8N for 3 seconds.

c. The force decreases linearly to 0N in 2 seconds.

1. Calculate the initial momentum.

2. Calculate the total impulse.

3. Calculate the final momentum.

4. Calculate the final velocity.

5. Answer the following question. A 4kg ball moving at 3m/s bounces off a wall and is observed to be moving at 3m/s in the opposite direction. What was the total impulse on the ball?

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