A) The acceleration vector points to the centre of the circle.
B) The acceleration vector is tangent to the circle.
C) The velocity vector is tangent to the circle.
D) The velocity and acceleration vectors are perpendiculai to each other.
Correct Answer: B
Solution :
[b] In circular motion we know the velocity vector is tangent to the circle. If a particle moves in a circle with constant angular speed it perform uniform circular motion. In uniform circular motion the tangential acceleration of the particle is zero. The particle moves under radial acceleration only which points to the centre of the circle. Hence the velocity and acceleration vectors are perpendicular to each other.
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