Question

A force acts on a body of mass 3 kg such that its velocity changes from 4 m s${}^{-1}$ to 10 m s${}^{-1}$. The change in momentum of the body is :

• A. 42 kg m s${}^{-1}$
• B. 2 kg m s${}^{-1}$
• C. 18 kg m s${}^{-1}$
• D. 11 kg m s${}^{-1}$

Answer 1

The correct option is C 18 kg m s${}^{-1}$

$\Delta p=m(v-u)=3(10-4)$
$=18kgm{s}^{-1}$