Question

The maximum time period of any simple pendulum on the earth is

• A. 180.5 min
• B. 100 min
• C. 90.5 min
• D. 84.5 min

Answer 1

Answer: (D)

For maximum time period $l\approx R_e=6400km$ As $T=2\pi \sqrt{\frac{l}{g}}=2\times \pi \sqrt{\frac{600\times {10}^3}{9.8}}$ or $T=84.5\min$