CONCEPT:
- When a particle is revolving in the circular path then the centripetal force acting on the particle towards the center of the circular path.
F = mv2/r
Where F is the centripetal force, m is mass of the particle, v is velocity, and r is the radius.
F = m a
Where m is mass of the particle, a is the acceleration.
EXPLANATION:
So from the above equations, comparing both we get-
Acceleration = v2/r
Acceleration will be along the radius when the particle is moving around a circular path.
So option 2 is correct.