Question

A boy walks up the hill. His displacement from his starting point is (800,150)meter. how much gravitational potential energy has he gained?

Answer 1

Given:

A boy walks up the hill. His displacement from his starting point is (800,150)meter.

To find:

Gravitational potential energy gained ?

Calculation:

First of all, it's important to know a few things about gravitational potential energy !

• Gravitational Potential Energy is not path dependent, so it only depends on the final position w.r.t the reference plane.

Here, we need to consider only the Y axis value for calculation .

$\rm \: PE = mgh$

$\rm \implies \: PE = m \times 10 \times 150$

$\rm \implies \: PE = 1500m \: joule$

So, the potential energy gained is 1500m joule.

Answer 2

Given:-

A boy walks up the hill. His displacement from his starting point is (800,150)meter.

To Find:-

Gravitational potential energy gained ?

Calculation:-

First of all, it's important to know a few things about gravitational potential energy !

• Gravitational Potential Energy is not path dependent, so it only depends on the final position w.r.t the reference plane.

Here, we need to consider only the Y axis value for calculation.

P.E.= mgh

⇒P.E.= m×10×150

⇒P.E.= 1500m joule

So, the potential energy gained is 1500m joule.

☆Hope it helps you☆