AP EAMCET · PHYSICS · Laws of Motion
A string of a pendulum of length \(l\) is displaced through \(90^{\circ}\) from its vertical and released. Then, the minimum streng th of the string needed to withstand the tension as, the pendulum passes through its mean position is
- A \(m g\)
- B \(3 m g\)
- C \(5 \mathrm{mg}\)
- D \(6 m g\)
Answer & Solution
Correct Answer
(B) \(3 m g\)
Step-by-step Solution
Detailed explanation
Length of penduIum \(=l\) Centre of gravity of pendulum's string \(=\frac{l}{2}\) When pendulum is displaced through \(90^{\circ}\) and released, then according to law of conservation of energy. Gravitational potential energy \(=\) Kinetic energy…
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