Question

A stone of mass 500 g is raised from a height of 2 m to 4 m. Find the change in its potential energy.​

Answer 1

Answer:

The answer is 9.8.

Explanation:

Initially,

P.E. = mgh

P.E. = 0.5 kg x 9.8 x 2

P.E. = 9.8

Finally,

P.E. = mgh

P.E. = 0.5kg x 9.8 x 4

P.E. = 19.6

Now,

Change in PE = final PE - initial PE

Change in PE = 19.6 - 9.8 = 9.8