A string of negligible thickness is wrapped several times around a cylinder kept on a rough horizontal surface. A man standing at a distance L from the cylinder holds one end the string and pulls the cylinder towards him there is no slipping anywhere. The length of the string passed through the hands of the man while cylinder reaches his hands is _______.
A. L
B. 2L
C. 3L
D. 4L
Answer:B
A string of negligible thickness is wrapped several times around a cylinder kept on a rough horizontal surface. A man standing at a distance L from the cylinder holds one end the string and pulls the cylinder towards him there is no slipping anywhere. The length of the string passed through the hands of the man while cylinder reaches his hands is _______.
A. L B. 2L C. 3L D. 4L