The velocity of a scooter increases uniformly from 0m/s to 20m/s in 10s. During these 10s, how would you classify its motion and why?
(a) Uniform, because acceleration is constant at 2ms−2.
(b) Non-uniform, because its velocity is changing with time.
(c) Uniform, because acceleration is zero.
(d) Non-uniform, because its direction is changing.