Question

Which of the following is true for a circular motion with a constant speed?

• A. Velocity and accelerationare both constant
• B. Velocity is constant but the acceleration changes
• C. Acceleration is constant but the velocity changes
• D. Velocity and acceleration both change

Answer 1

The correct option is D Velocity and acceleration both change

When an object moves in a circle at a constant speed its velocity (which is a vector) is constantly changing because of change in direction.

Acceleration in uniform motion is directed towards center and hence direction of acceleration is always changing. Hence, acceleration is also changing.