Two objects P and Q start together from the same point and move in straight lines with uniform speed. On a displacement–time graph drawn on common axes, the straight line for P makes an angle of 60∘ with the time axis, while the line for Q makes an angle of 30∘. What does this indicate?
(a) Both accelerate uniformly
(b) Q moves faster than P
(c) P moves faster than Q
(d) Both move with the same speed