1. A man stands on a cart. The cart does not move. The total mass of the man and cart is 160 kg. The man throws an 8.0-kg rock horizontally. The speed of the rock equals 5.0 m/s relative to the ground. a. Find the total kinetic energy of the man and cart. b. Find the work done by the man. Point out the laws of physics used in your solution. (6T, 2C) 2. A bullet flies horizontally at a speed of 40.0 m/s, hits a wooden block suspended from a 4.0-m string, and gets stuck in the block. Find the angle of deviation of the string. The mass of the bullet is 20.0 g, the mass of the block is 5.0 kg. Point out the laws of physics used in your solution. (4T, 2C)