Question

If the length of a pendulum is made 9 times and mass of the bob is made 4 times, then the value of time period becomes –

• A. 3 T
• B. 3/2 T
• C. 4 T
• D. 2 T

Answer 1

Answer: (A)

3 T

Answer 2

Time period does not depend on mass

T µ $\sqrt{\mathcal{l}}$ …. (i), T¢ µ $\sqrt{9\mathcal{l}}$ ….(ii) or T¢ = 3 T.