Question

The time taken by a freely falling body from a height 78.4 m is
4s
2s
1s
3s

Answer 1

Answer:

4 seconds.

Explanation:

Using the formula

$s=ut+\frac{1}{2}at^2$

$78.4=\frac{1}{2}*9.8*t^2\\\\t^2=16\\\\t=4~second$