Q 11-05-148JEE MainJEE Main 2021 (20 Jul, Shift 2)Easy
If the kinetic energy of a moving body becomes four times its initial kinetic energy, then the percentage change in its momentum will be:
Answer: (A) 100%
$p = \sqrt{2mK}$; $K \to 4K$ gives $p \to 2p$, an increase of 100%.
Solution by Sreeraj P, M.Sc Physics