Question

When a particle moves in a circle with a uniform speed

• A. its velocity and acceleration are both constants
• B. its velocity is constant but the acceleration changes
• C. its acceleration is constant but the velocity changes
• D. its velocity and acceleration both change

Answer 1

Answer: (D)

Speed is constant but the direction is changing continuously hence velocity is changing.
Acceleration is acting radially inward, hence acceleration is also changing.