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

Answer:

By 1000 joules

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