NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

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Toy cart tied to the end of an unstretched string of length a, when revolved moves in a horizontal circle of radius 2a with a time period T. Now the toy cart is speeded up until it moves in a horizontal circle of radius 3a with a period

T'

. If Hook’s law holds then

View answer and explanation

Correct option: A

T' = \sqrt {\frac{3}{2}} \;T

Option A is correct because it correctly relates the time periods to the radii of the circles using Hooke's law.

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