Question

Two bodies having mass 4 Kg and mass 5 Kg having same Kinetic energy find the ratio of there linear momentum?

(1) \(\sqrt{\frac 54}\)

(2) \(\sqrt{\frac 45}\)

(3) \(\sqrt{\frac 23}\)

(4) \(\sqrt{\frac 34}\)

Answer 1

Correct option is (2) \(\sqrt{\frac 45}\) 

\(\frac{P_1}{P_2} = \frac{\sqrt{2m_1k_1}}{\sqrt{2m_2k_2}} = \sqrt{\frac{m_1}{m_2}} = \sqrt \frac45\)