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A pendulum consists of a small bob of mass m attached to a
Chapter , Problem 101(choose chapter or problem)
A pendulum consists of a small bob of mass m attached to a string of length L. The bob is held to the side with the string horizontal (see Figure 7-56). Then the bob is released from rest. At the lowest point of the swing, the string catches on a thin peg a distance R above the lowest point. Show that R must be smaller than 2L/5 if the string is to remain taut as the bob swings around the peg in a full circle.
Questions & Answers
QUESTION:
A pendulum consists of a small bob of mass m attached to a string of length L. The bob is held to the side with the string horizontal (see Figure 7-56). Then the bob is released from rest. At the lowest point of the swing, the string catches on a thin peg a distance R above the lowest point. Show that R must be smaller than 2L/5 if the string is to remain taut as the bob swings around the peg in a full circle.
ANSWER:Step 1 of 4
At the peg, the velocity of the small bob is 