Question

A body initially at rest at a certain height from the ground is falling freely under gravity. At a time of one second, the body is at a height of 120 m from the ground. At a time $t=4.5\,s$, if the potential energy of the body is K times its total energy, then the value of K is (Acceleration due to gravity $=10\,ms^{-2}$)

• A. 0.19
• B. 0.81
• C. 0.37
• D. 0.63

Hint:

For freely falling bodies: \[ \frac{PE}{\text{Total Energy}} = \frac{\text{Current Height}}{\text{Initial Height}} \]

Answer 1

The Correct Option is A