Question

Tension in the string in the mean position of an oscillating pendulum is:

• A. Same as tension when it is not oscillating
• B. Depend upon the time speed
• C. Less than tension when it is not oscillating
• D. More than tension when it is not oscillating

Answer 1

The correct option is D More than tension when it is not oscillating

Without oscillation tension $T_0=mg$

With oscillation at mean position let some velocity $v$ ,

then $T=mg+\frac{m{v}^2}{l}$

$=T_0+\frac{m{v}^2}{l}$