Question

Kara drops a rock from the edge of a cliff and it takes 7.00 s for the rock to reach the ground. What is the cliff’s height?

Answer 1

h = 204.1 m

Step-by-step explanation:

Given that,

Time taken to reach the ground, t = 7 s

We need to find the height of the cliff. We can find it using second equation of kinematics as follows :

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

Here,

u = 0 (at rest initially)

a = g

So,

`h=(1)/(2)gt^2\\\\h=(1)/(2)* 9.8* 7^2\\\\h=204.1\ m`

So, the cliff's height is 204.1 m.