Constant Speed and Path – Rankers Physics
Topic: Circular Motion
Subtopic: Uniform Circular Motion

Constant Speed and Path

Assertion (A): If the speed of a body is constant, the body cannot have a path other than a circular or straight line path.
Reason (R): It is not possible for a body to have a constant speed in an accelerated motion.
 
(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:

A body can have constant speed and follow a curvilinear path (e.g., parabolic trajectory if air resistance is ignored). So (A) is false. A body can have constant speed but changing direction, leading to acceleration (e.g., UCM). So (R) is false.

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