Question

The net force versus time graph of a rocket is shown in figure The mass of the rocket is `1200kg`. Calculate velocity of rocket, 16 seconds after starting from rest. Neglect gravity.

Answer 1

Correct Answer - B
Impulse=area under `F-t` graph
`=Deltap=m(v_f-v_i)`
`:. v_f=(Area)/(m)` (as `v_i=0`)
`=1/2xx((20xx10^3)(8+16))/(12000)`
`=200m//s`