A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stop watch measures the stone's trajectory time from the top of the cliff to the bottom to be 4.3 s. What is the height of the cliff?

Answer 1

In the vertical direction:
hf=hi+gt
0=hi-9.8t solve for hi

Answer 2

58meters

Answer 3

91 meter