Question

A 50kg hiker is standing on the edge of a cliff. Find the hiker’s gravitational potential energy if the cliff is 30m high.

Answer 1

14700 J

Step-by-step explanation:

The gravitational potential energy of an object is given by:

`U=mgh`

where

m is the mass

g is the gravitational acceleration

h is the height of the object above the ground

In this problem:

m = 50 kg is the mass of the hiker

`g=9.8 m/s^2`

h = 30 m is the heigth of the cliff

Substituting, we find

`U=(50)(9.8)(30)=14700 J`