Question

The angle between radius vector and centripetal acceleration is

• A. $\pi /2$
• B. $2\pi$
• C. $3\pi /2$
• D. $\pi$

Answer 1

The correct option is D $\pi$

Consider a particle P is moving along a circle with centre as origin as shown in figure .For any position of P in the path the radius vector lie along OP and directed towards the particle.

So the centripetal acceleration and radius vector are exactly directed opposite to each other at any position of the particle along the path.

So the angle between centripetal acceleration and radius vector is 180 degrees