Q 11-05-047JEE MainEasy
A $4$ kg body moves along a straight line with velocity $v = 3t$ m/s, where $t$ is in seconds. Find the work done by the net force on it during the first $2$ s, in joules.
Numerical value type. Enter your answer.
Answer: 72
Concept. Work–energy theorem.
Step 1. Speeds. $0$ and $6$ m/s.
Step 2. Work. $\dfrac12(4)(36) = 72$ J.
Answer. $72$.
Solution by Sreeraj P, M.Sc Physics