Question

How much energy does a 50 kg rock have if it is sitting on the edge of a 15 m cliff?

7350 J
750 J
5625 J
18750 J

Answer 1

7350 J

Step-by-step explanation:

The gravitational potential energy of the rock sitting on the edge of the cliff is given by:

`U=mgh`

where

m is the mass of the rock

g is the gravitational acceleration

h is the height of the cliff

In this problem, we have

m = 50 kg

g = 9.8 m/s^2

h = 15 m

Substituting numbers into the formula, we find:

`U=(50 kg)(9.8 m/s^2)(15 m)=7350 J`