Question

An elevator weighs 1500 Newtons. Calculate how much potential energy it has when it is lived 500 meters in the air.

Answer 1

An elevator has 750,000 J when it is lived 500 meters in the air

Answer: Option D

Explanation:

The expression to find the potential energy completely on the basis of forces that on two objects. It can be written as

$potential\ energy (P . E)=m \times acceleration\ due\ to\ gravity\ (g) \times height (h)$

Where,

m – mass of object

Acceleration due to gravity =  $9.8 \mathrm{m} / \mathrm{s}^{2}$

h = 500 meters

Force = 1500 Newton

As we know, according to Newton second law of motion, the force can be expressed in terms of mass and gravity (F= ma). So, the potential energy can be calculated as

$P . E=F \times h=1500(500)=750000 J$

Hence, an elevator has 750,000 J when it is lived 500 meters in the air.