A thin string is wrapped several times around a cylinder kept on a rough horizontal surface. A boy standing at a distance λ from the cylinder draws the string towards him as shown in figure. The cylinder rolls without slipping. The length of the string passed through the hand of the boy while the cylinder reaches his hand is
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Verified by ExpertsThe correct answer is:
B
When A point travels λ distance then B point 2 λ so, 2 λ length of string passes through the hand of the boy .
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