Highly selective Backlog Qs for JEE MainPhysicsOscillations
In a stationary lift, time period of a simple pendulum is ' T '.' The lift starts accelerating downwards with acceleration ( g 4 ) , then the time period of the pendulum will be
Options
- A3 2 ~T
- B2 3 ~T
- C3 4 ~T
- D4 3 ~T
Correct answer
B. 2 3 ~T
Step-by-step solution
Time period of pendulum: T=2 L g When lift is accelerated downward with acceleration g 4 , aligned & g=g- g 4 & g= 3 g 4 aligned New Time period will be aligned & T ₁=2 4 ~L 3 ~g & ~T ₁=2 2 3 L g & T ₁= 2 3 ~T aligned