Question

Find the gravitational potential energy of 3.5 kg mass kept at a height of 20 m above the ground. The force of gravity on mass of 1 kg is 10 N.​

Answer 1

Explanation: F = mg

On mass 1 kg

10 N = (1 kg) × g

g = 10 m/s²

Potential energy = mgh

= 2.5 kg × 10 m/s² × 15 m

= 375 joules

Gravitational potential energy on mass 2.5 kg is 375 joules

Answer 2

Answer:

700 J

Explanation:

Gravitational potential is defined by the product of weight(mg) and height from the ground(h).

Here,

weight mg = 3.5 * 10  N

                   = 35 N

 height = 20 m.

Hence,

P.E. = 35 * 20  J

      = 700 J