STANDARD Physics Centripetal Acceleration MCQ Question
Centripetal acceleration is
a constant vector
a constant scalar
a magnitude changing vector
not a constant vector
Correct Answer
Detailed Explanation
Centripetal acceleration, a_c = rac{v^2}{R}, where v is the speed of an object and R is the radius of the circle. It is always directed towards the centre of the circle. Since v and R are constants for a given uniform circular motion, the magnitude of centripetal acceleration is also constant. However, the direction of centripetal acceleration changes continuously. Therefore, a centripetal acceleration is not a constant vector.
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