Question

A rock is dropped from a helght of 2.5 meters. What is its velocity when it reaches the ground?

Answer 1

u=0 m/s

h=2.5m

Using kinematic eq:

`{v}^(2) - {u}^(2) = 2gh \\ {v}^(2) - {0}^(2) = 2gh \\ v = √(2gh) \\ v = √(2 * 10 * 2.5) \\ v = √(50) \\ v = 7.07m/s`