Question

You drop a stone from rest into a well that is 5.2m deep. How long does it take before you hear the splash?

Answer 1

So after 1.0301 sec we hear the splash

Step-by-step explanation:

We have given that height of the well h = 5.2 m

As the stone is dropped from rest so initial velocity u = 0 m/sec

Acceleration due to gravity
`g=9.8m/sec^2`

We have to find the time

From second equation of motion we know that

`h=ut+(1)/(2)gt^2`

`5.2=0* t+(1)/(2)* 9.8* t^2`

`t^2=1.061`

t = 1.0301 sec