Question

A simple pendulum has time period T. Its time period in a lift which is moving upwards with acceleration 3m s⁻² is

• A. t√9.812.8
• B. t√12.89.8
• C. t√9.86.8
• D. t√6.89.8

Hint:

Upward acceleration increases effective gravity.

Answer 1

The Correct Option is A

Step 1: Effective gravity: g'=g+a=9.8+3=12.8
Step 2: T' = T√((g)/(g'))
Step 3: T' = T√((9.8)/(12.8))