Question

Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively:

(i) Which object starts from rest?

(ii) Which object P and Q has more velocity after 5 second?

Answer 1

From the velocity-time graph of P and Q, we can directly read out that velocity of P at time, t = 0 is 15 m/s and the velocity of Q at time, t = 0 is 0 m/s

Hence, it is clear that P starts from rest.

From the graph for P and Q, we can directly read out that P has a velocity of 0 m/s after 5 seconds and Q has a velocity of 15 m/s after 5 seconds,

Hence Q has a higher velocity.