Question

A girl of weight 500 N climbs on top of a 2.0 m high wall. By how much does her g.p.a increase?

Answer 1

By 1000 joules

Step-by-step explanation:

Given

`Weight = 500N`

`Height = 2.0m`

Required

By how much does her GPA increases

To do this, we simply calculate the potential energy.

`GPE = mgh`

Where

`mg = Weight = 500N`

At the ground level, the height is 0

i.e.
`h = 0`

So:

`GPE = 500N * 0 = 0`

At:

`h = Height = 2.0m`

So, we have:

`GPE = mgh`

`GPE = 500N * 2.0m`

`GPE = 1000J`

Calculate the difference

`\triangle GPE = 1000J - 0J`

`\triangle GPE = 1000J`

Hence, it increases by 1000 joules