Kinematics Question 542

Question: The string of pendulum of length l it’s d it’splaced through 90o from the vertical and released. Then the minimum strength of the string in order to withstand the tension, as the pendulum passes through the mean position it’s[MP PMT 1986]

Options:

A) mg

B)3mg

C) 5mg

D) 6mg

Show Answer

Answer:

Correct Answer: B

Solution:

T=mg+mv2l

=mg+2mg=3mg where v=2gl from 12mv2=mgl

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