Find the momentum of a body of mass 100 g having a kinetic energy of 20 J.

Options

A. `2 kg ms^(-1)`
B. `(1)/(2) kg ms^(-1)`
C. 2 g cm `s^(-1)`
D. none of these

Answer

A

Explanation

`K = (P^(2))/(2m) = 20`
or `" " p^(2) = 20 xx 2 xx (100)/(1000)`
= 4
or p = 2 kg `ms^(-1)`