. Sketch the KE vs. time graph for a ball through straight up into the air. The ball is released and caught at the same level. Be sure to title the graph.
Be sure to label each axis.

2. A 35 kg sledder slides down from the top of a 5.9 m tall hill. The sledder starts with a speed of 2.63 m/s.

a) What is the sledder's speed at the bottom of the hill?

b) At the bottom of the hill, the sledder collides with a 50 kg person running at 8.5 m/s directly away from the sledder. You can assume both the sledder and the person are moving due east. The sledder and the person collide and the person falls into the sled. What is the velocity of the sledder and the person after the collision?

3. A person throws a 410 gram dodgeball straight up into the air. The dodgeball leaves the thrower's hand 1.5 m above the ground.

a) What is the speed of the dodgeball at its maximum height?

b) What was the dodgeball's initial speed if its maximum height is 21.72 m?

c) Before the thrower's hand starts to move, the speed of the dodgeball is zero. While the thrower's hand is touching the dodgeball, what is the change in the dodgeball's momentum?

d) If the dodgeball was in the thrower's hand for 1.15 seconds, what force did the thrower apply to it? You can assume the "hand force" is like a force that acts during a collision.