Linear Speed in Uniform Circular Motion – Rankers Physics
Topic: Circular Motion
Subtopic: Uniform Circular Motion

Linear Speed in Uniform Circular Motion

Assertion (A): In uniform circular motion of a body, its linear speed remains constant.
Reason (R): In uniform circular motion total acceleration of the body has no radial component.
 
(1) Both (A) & (R) are true and the (R) is the correct explanation of the (A)
(2) Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(3) (A) is true but (R) is false
(4) Both (A) and (R) are false

Solution:

By definition, uniform circular motion means constant linear speed. So (A) is true. In UCM, the only acceleration is centripetal, which is entirely radial and directed towards the center. So (R) is false.

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