Question

A spherical body of mass $2\, kg$ starting from rest acquires a kinetic energy of $10000\, J$ at the end of $5^{\text {th }}$ second The force acted on the body is ___$N$

Answer 1

The correct answer is 40.
21​×2×v2=10000
⇒v2=10000
⇒v=100m/s
⇒v=at=a×5=100
⇒a=20m/s2
F=ma=2×20=40N