Question

Calculate the height from which a body is released rest if its velocity just before hitting the ground is 30ms-1

Answer 1

45.9m

Step-by-step explanation:

Given parameters:

Final velocity = 30m/s

Initial velocity = 0m/s

Unknown:

Height of fall = ?

Solution:

The motion equation to solve this problem is given below;

V² = U² + 2gH

V² = 0 + (2 x 9.8 x H)

30² = 19.6H

H =
`(900)/(19.6)` = 45.9m