A stone is thrown horizontally with an initial speed of 10 m/s from the edge of a cliff. A stopwatch 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 if air resistance is negligibly small?
A) 43 m
B) 77 m
C) 22 m
D) 91 m

Question

Quizplus · Accepted Answer

The height of the cliff can be calculated using the formula for vertical motion: $ h = \frac{1}{2} g t^2 $, where $ g = 9.8 \, \text{m/s}^2 $ and $ t = 4.3 \, \text{s} $. Plugging in the values, $ h = \frac{1}{2} \times 9.8 \times (4.3)^2 = 90.9 \, \text{m} $, which rounds to 91 m.

A Stone Is Thrown Horizontally with an Initial Speed of 10