Particle projected at a downward angle from a height above ground

In this tutorial I look at the following question.

A stone is thrown from the edge of a vertical cliff with a speed of 26ms-1 at an angle of tan-1 5/12 below the horizontal. The stone hits the sea at a point 72m from the base of the cliff.

Find the time of flight and the height of the cliff.

2017-11-12T11:46:48+00:00