Which quantity does not change when a body moves with constant speed in a circle?
Correct answer: A. Speed
- A. Speed
- B. Acceleration
- C. Velocity
- D. Momentum
Explanation
This is correct because although direction changes, the magnitude of speed remains constant in uniform circular motion.
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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