Question

Which of the following statements is false for a particle moving in a circle with a constant angular speed?

• A. The velocity vector is tangent to the circle
• B. The acceleration vector is tangent to the circle
• C. The acceleration vector points to the centre of the circle
• D. The velocity and acceleration vectors are perpendicular to each other

Answer 1

Answer: (B)

the acceleration is defined as the rate of change in velocity with time. The velocity of a particle in uniform circular motion changes continuously and the net acceleration is directed towards the centre of the circle. It is known as the centripetal acceleration.
As the velocity of a particle is towards the tangent on the circle, the velocity and acceleration vectors are perpendicular to each other.