# Question

A 1.20-kg ball is projected straight upward with an initial speed of 18.5 m/s and reaches a maximum height of 14.7 m.

(a) Show numerically that total mechanical energy is not conserved during this part of the ball’s motion.

(b) Determine the work done on the ball by the force of air resistance.

(c) Calculate the average air resistance force on the ball and the ball’s average acceleration.

(a) Show numerically that total mechanical energy is not conserved during this part of the ball’s motion.

(b) Determine the work done on the ball by the force of air resistance.

(c) Calculate the average air resistance force on the ball and the ball’s average acceleration.

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