A rock is thrown from the top edge of a seaside cliff 20.0 m above the water
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A rock is thrown from the top edge of a seaside cliff 20.0 m above the water. The rock is aimed toward a floating buoy that is 30.0 m horizontally from the base of the cliff and at water level. The rock is released at an angle of 30.0° above the horizontal. Neglect air resistance and use g=9.8m/s2.
(a) Calculate the launch speed required for the rock to strike the buoy.
(b) Determine the time interval between release and impact.