A wheel of a bullock cart is rolling on a level road as shown. If its linear speed is v in the direction shown, which statement is correct? P and Q are the highest and lowest points on the wheel, respectively.

Question

G1 Physics · Accepted Answer

Step 1: For pure rolling, centre-of-mass speed is v and rim speed relative to the centre is also v. Step 2: At the highest point P, the two velocities are in the same direction, so speed is 2v. Step 3: At the point of contact Q, the two velocities cancel, so instantaneous speed is zero. Thus P moves faster than Q. Final answer: A.