Question

an object of mass 40 kg is raised to a height of 5 m above the ground what is its potential energy if the object is allowed to fall find its kinetic energy when it is half way down

Answer 1

1. potential energy of the object= mass×gravity×height

therefore P.E.= 40×9.8( constant value of gravity)×5

                     =1960 Joule

2. the kinetic energy during the free fall is always zero.

therefor K.E.= 0 J

Answer 2

Answer:

we know that E. P. = m(mass) × g(gravity) × h(height)

= 40×9.8×5

=392×5

1960 Joule

Explanation:

the kinetic energy will be zero as the free fall is always 0.

therefore, E. K. =0.