List of top Physics Questions on Speed and velocity asked in NEET (UG)

The velocity (v) - time (t) plot of the motion of a body is shown below :
 

The acceleration (a) - time(t) graph that best suits this motion is :

A wheel of a bullock cart is rolling on a level road, as shown in the figure below. If its linear speed is v in the direction shown, which one of the following options is correct (P and Q are any highest and lowest points on the wheel, respectively) ?