Question

find the gravitational potential energy of 2.5 kg mass kept a height of 15 m above the ground the force of gravity on mass 1 kg is 10 Newton

Answer 1

m = 2.5 kg

h = 15m

g = 10m/s^2

U = mgh

= 2.5 × 10 × 15

=. 375J


Thanks

Answer 2

The gravitational potential energy (in J) is the product of the mass (in kg), the acceleration due to gravity (in m/s²) and the height above the ground (in m).

We are told that the mass, m, is 2.5 kg and the height, h, is 15 m. But what about the acceleration due to gravity?

From Newton’s Second Law of Motion, we have Force = mass times acceleration. The question tells us that the gravitational force acting on a mass of 1 kg is 10 N, which means that the gravitational acceleration is 10 m/s².

We now have all we need to calculate the gravitational PE:

PE=mgh=2.5 kg×10 ms−2×15 m=375 J

Answer: 375 Joules