The force F acting on a particle of mass m is indicated by the force-time graph as 31/1 shown. The change in ZO momentum of the particle over the time interval from zero to 8 s is

Options

A. `24 Ns`
B. `20 Ns`
C. `12 Ns`
D. 6 Ns`

Answer

C

Explanation

change in momentum
=Area under `f-t` group in that interval + Area of reatangle FGHI
` =1/2 xx 2xx 6-3 xx2 +4 xx 3 = 12 N s`