Question

If a particle is moving on a circular path with constant speed, then the angle between the direction of acceleration and its position vector w.r.t. centre of circle will be

• A. Zero
• B. $\frac{\pi }{2}$
• C. $\pi$
• D. $2\pi$

Answer 1

Answer: (C)

$\pi$

Direction of Velocity is tangential to the circular path at any instance. At the very same instance, acceleration is along the radius , directed towards centre. So the angle between the direction of acceleration and its position vector with respect to the centre of the circle will be $\pi$ or ${180}^0$.