nA 0.21 kg apple falls from a tree to the ground, 4.0 m below. Ignoring air resistance, answer the following using energy principles: a) What is the apple's velocity immediately before hitting the ground? (2 marks) 13) How long did it take the apple to reach the ground? (2 marks) 2) If the coefficient of kinetic friction between the table and the block is 0.45, determine the following using energy principles: a) The speed of the blocks immediately before the 1.8 kg block touches the ground (3 marks) b) How far does the 2.4 kg block slide after the 1.8 kg block touches the ground? (2 marks) 1- % m 3)A 0.50 kg ball is thrown vertically upward from a height of 1.5 m and an initial velocity of 10 mls. Using energy principles and neglecting air resistance, what is the maximum height the ball reaches? (3 marks) 4)A1.5 kg weight is attached to a 1.5 m long pendulum. The weight is released from the vertical position. a) If the system is frictionless, calculate the tension in the pendulum arm at the weight's lowest point. (3 marks) b) If the energy lost to friction along the path is 3 J/m, calculate the velocity of the weight at bottom of the arc. (2 marks)