If a cyclist is riding around a curve at constant speed, is he accelerating? If so, what is the direction of his acceleration?

Question

A. Yes, he is accelerating in the direction opposite of his motion

B. Yes, he is accelerating in the direction of his motion

C. Yes, he is accelerating towards the outside of the curve

D. Yes, he is accelerating towards the inside of the curve

E. No, he is not accelerating

Answer 1

The magnitude of his velocity is not changing, but its direction is changing.

And it is constantly changing inward.

Therefore the correct answer is D.