Question

An object is moving along the path $O A B O$ with constant speed, then

• A. the acceleration of the object while moving along to path $O A B O$ is zero
• B. the acceleration of the object along the path $O A$ and $B O$ is zero
• C. there must be some acceleration along the path $A B$
• D. Both (b) and (c)

Answer 1

Answer: (D)

For path $O A$ and $B O$, the magnitude of velocity (speed) and direction is constant, hence acceleration is zero.
For path $A B$, since this path is a curve, so the direction of the velocity changes every moment but the magnitude of velocity (speed) remains constant.
Since, the direction of velocity is changing, i.e., there must be some acceleration along the path $A B$.