Question

If the metal bob of a simple pendulum is replaced by a wooden bob, then its time period will

• A. remain the same
• B. decrease
• C. increase
• D. first (b) then (c)

Answer 1

Answer: (A)

remain the same

Answer 2

We know that the time period of a simple pendulum is given by $T=2 \pi \sqrt{\frac{l}{g}}$, which is independent of the mass of the bob. Therefore if we replace the metal bob of the simple pendulum with a wooden bob, the time period of the pendulum remains the same.