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General
Easy
Question
Toy cart tied to the end of an unstretched string of length , when revolved moves in a horizontal circle of radius with a time period . Now the toy cart is speeded up until it moves in a horizontal circle of radius with a period . If Hook’s law holds then
= 3 2 T '/> = 3 2 T '/> = 3 2 T '/> = T '/>
The correct answer is:
Extension is first case
From Hooke’s law
In second case,
On dividing Eq. (ii) by Eq. (i)
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