Question

What is the change in gravitational potential energy when 7000 N
elevator moves from street level to the top of building 300 m
above the street level?​

Answer 1

Answer:

2100000 joules

Explanation:

Change in potential energy = work done in raising the elevator = weight force * distance moved = mg * h

=(7000 N * 300 m)

= 2100000 joules

Answer 2

The change in gravitational potential energy of the elevator is 21,00,000Joules.

Given:-

Weight of elevator (mg) = 7000N

Height of the building (h) = 300m

To Find:-

The change in gravitational potential energy of the elevator.

Solution:-

We can simply find out the change in gravitational potential energy of the elevator by using the following steps.

As

Weight of elevator (mg) = 7000N

Height of the building (h) = 300m

Also, the change in gravitational potential energy of the elevator is given by

U = mg*h

U = 7000*300

U = 21,00,000joules

Hence, The change in gravitational potential energy of the elevator is 21,00,000Joules.

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