Question

A stone dropped from the top of the tower touches the ground in 4 seconds. the height of the tower is about​

Answer 1

Answer:

78.4m

Explanation:

apply

$h = \frac{1}{2} g {t}^{2}$

$h = \frac{1}{2} \times 9.8 \times {4}^{2} = 78.4m$