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1. A hockey puck is moving across the ice at 4.0 m/s. If the coefficient of kenetic friction is 0.030 how far will the puck slide before coming to rest?

2. A pitcher throws a baseball at 30.0 m/s towards a batter. The batter hits the ball back at a velocity of 65.0 m/s. The ball is in contact with the bat for 0.0018 seconds and has a mass of 140 grams.

A) What is the impulse exerted on the ball?

B) What avergae force is exerted on the ball?

3. A ramp is 2.50 meters long and 0.38 meters high. A wood block is slid up the ramp from the bottom at an initial velocity of 4.00 m/s. If the coefficient of kinetic friction is 0.25, what is the velocity of the block at the top of the ramp?

4. An 80.0 kg quarterback is running at 8.0 m/s in the positive "x" direction. He is hit by a 120 kg tackle running at 6.5 m/s at an angle of 40.0 degrees. The two collide and move together, the tackle being careful not to let go of his grip. What is the final velocity and direction of the two?