1. A 0.37 kg rock is thrown vertically upward from the top of a 37 m cliff. When it hits the ground at the base of the cliff, the rock has a speed of 33 m/s. Consider that air resistance is negligible. Use conservation of total mechanical energy principal.
a) Find initial speed of the rock
b) The greatest height of the rock as measured from the base of the cliff
c) Types of mechanical energy of the rock when
i) its thrown upwards
ii) it reaches the maximum height
iii) It reached the base of the cliff.