Q5.14 Figure 5.16 shows the position-time graph of a particle of mass 4 kg. What is the (a) force on the particle for ?
(i) For t < 0 :
In this range the position of particle coincides with time, that implies no motion takes place. Hence net force on the particle is zero.
(ii) For t > 4 :
In this range displacement of the particle is not changed so the net force is zero.
(iii) For 0 < t < 4 :
In this range the slope of the position-time graph is constant that means the particle is moving with constant speed. And hence net force, in this case, is zero.