Question

A box of mass 10 kg placed at the rooftop of height 15.2 metre. Calculate the amount of energy stored in the box​

Answer 1

Answer:

Answer

Initial Velocity u=0

Fianl velocity v=?

Height, s=19.6m

By third equation of motion

v

2

=u

2

+2gs

v

2

=0+2×9.8×19.6

v

2

=384.16

⇒v=19.6m/s

Answer 2

Answer:

amount of energy stored in the box = mgh

= 10 * 9.8 * 15.2

= 1489.6 J