Question: The string of a pendulum of length 𝑙 is displaced through 90° 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 is
(A) ) 𝑚g
(B) 6 𝑚g
(C) 3 𝑚g
(D) 5 𝑚g
Answer: option (C)
Solution:
