A simple pendulum has a string of length l and bob of mass m. When the bob is at its lowest position, it is given the minimum horizontal speed necessary for it to move in a circular path about the point of suspension. The tension in the string at the lowest position of the bob is
Text Solution
Verified by ExpertsThe correct answer is:
D
Applying the principle of conservation of energy between A and B.
or 
At B, 
= T 2 - mg
or mg + 4 mg = T 2 – mg or T 2 = 6mg.
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