[" 1.A car moves on a circular road.It describes equal angles "],[" about the centre in equal intervals of time.Which of the "],[" following statements about the velocity of the car is true? "],[" (a) Magnitude of velocity is not constant "],[" (b) Both magnitude and direction of velocity change "],[" (c) Velocity is directed towards the centre of the circle "],[" (d) Magnitude of velocity is constant but direction changes "]