Question

An object of mass 40 kg is raised to a height of 5m 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

Answer:

u= m×g×h

u= 40×9.8×5

u= 1960jule.

then, to find kinetic energy when it is half way down.

k=m×1/2×(v)^2

k= 40×1/2×2.5×2.5

k= 20×6.25

k=125 jule.