Question

A body of mass 0.2 kg is falling freely from a height of 180 m from the ground. The ratio of the works done by the gravitational force in the first two seconds and in the next two seconds of motion of the body is

• A. 1 : 3
• B. 1 : 2
• C. 2 : 3
• D. 3 : 4

Hint:

{Galileo's Law of Odd Numbers:} For a body falling from rest, distances travelled in equal successive time intervals are in the ratio $1 : 3 : 5 : 7 \dots$ Here, 1st interval is $0-2s$ (Ratio part 1) and 2nd interval is $2-4s$ (Ratio part 3). The answer is directly 1:3.

Answer 1

The Correct Option is A