You are standing on a cliff which is 190 m high compared to the ground. You throw a ball at an angle of 0 = 31 with the horizontal, and at a speed of 17 m/s. Use g 9.8 m/s in this problem, and ignore air resistance. Note that you could solve the following questions using the Projectile Motion equations, but instead we will use the concept of energy here. h 1a) With what speed does the ball hit the ground? answer = units? 11:50 AM Example 2 Consider the two blocks shown in the diagram below. Block A has a mass of 4.5 kg and block B a mass of 15 kg. The pulley is massless and frictionless. Initially block B is at a height of h = 0.4 m above the ground and block A is moving to the left with a speed of VA,i = 8 m/s. The surface that A is moving on is rough and has a kinetic friction coefficient of k = 0.6. Use g = 9.8 m/s in this problem and ignore air resistance. VA,i A B 2a) How far does block A move to the left, before it momentarily stops and moves right again? answer = units? Check your answer not yet solved Show solution 2b) With what speed does block B hit the ground? answer = units? Check your answer not yet solved Show solution 2c) What is the total amount of energy lost because of the friction on A? answer = units? Check your answer not yet solved Show solution