You must show all work and circle your final answer. 1. A person skips a 0.15 kg stone across a pond. It strikes the level surface of the water at 18 m/s at an angle 20" with the water (so 70" from the vertical) and bounces off the water at the same angle and speed. (a) What is the magnitude of the momentum of the stone? (b) What is the magnitude of the impulse the water exerts on the stone? (c) What is the direction of the impulse the water exerts on the stone? 2. Two blocks of equal mass are on a frictionless surface, as shown. A perfectly elastic spring with negligible mass is attached to block 2, which is at rest. Meanwhile, block 1 is moving to the right at 4.0 m/s. 2 (a) After the two blocks collide, what will be the final velocity of the block 1? (b) After the two blocks collide, what will be the final velocity of the block 2? 3. A BB gun shoots a 0.34 gram pellet at 84 m/s into a 0.050 kg stationary clay target. The BB lodges itself in the clay target. (a) What is the final velocity of the combined pellet and clay target? (b) What is the change in kinetic energy? (c) Assume the pellet experiences a constant strength opposing force of 20 N as it travels into the clay target. Given your answer to (b), how far does the pellet travel into the target? 4. A person leaps into the air to catch a speeding ball. The ball has a mass of 1.5 kg, and the person has a mass of 65 kg. The ball is traveling horizontally at 42 m/s the moment before it is caught, and the player is traveling upward at 1.0 m/s upward at the moment before the catch. (a) Assume the effects of gravity are negligible during the catch. What is the final speed of person and ball together, after the catch? (b) What is the direction of their velocity