The force F acting on a particle of mass m is indicated by the force–time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is 
24 Ns
20 Ns
12 Ns
6 Ns
Next Question
The minimum force required to start pushing a body up a rough (frictional coefficient μ) inclined plane is F1 while the minimum force needed to prevent it from sliding down is F2. If the inclined plane makes an angle θ from the horizontal such that tan θ = 2μ, then the ratio F1/F2 is