Question

Example to measure the interval of time of a small stone dropped from 1m height.

Answer 1

The time required is 0.45 s.

Step-by-step explanation:

Height, h = 1 m

initial velocity, u = m/s

Let the time is t.

Use second equation of motion

`h = u t + 0.5 at^2\\\\1 = 0 +0.5 * 9.8 * t^2\\\\t = 0.45 s`