Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a circular turn. Which statement is true about the acceleration of the cars? The acceleration of both cars is zero, since they are traveling at a constant speed. Car A is accelerating, but car B is not accelerating. Car A is not accelerating, but car B is accelerating. Both cars are accelerating.

Car A is not accelerating, but car B is accelerating

Explanation:

Car A is not accelerating because , it is moving with uniform speed in a particular direction . Therefore its velocity too is not changing .

But car B is accelerating because , though its speed is uniform but its velocity is changing due to change in direction . On a circular path , direction of speed changes every moment . Therefore it has an acceleration called centripetal acceleration . Hence car B has acceleration.

if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).