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  • Solve this problem A simple pendulum is attached to the roof of a lift. If time peiod of oscillation, when the lift is stationary is T. Then frequency of oscillation, when the lift fall freely will be

A simple pendulum is attached to the roof of a lift. If time peiod of oscillation, when the lift is stationary is T. Then frequency of oscillation, when the lift fall freely will be 

  • Option 1)

    zero

  • Option 2)

    T 

  • Option 3)

    \frac{1}{}T

  • Option 4)

    None of these

 

Answers (1)

best_answer

When lift falls freely efective acceleration and frequency of oscialltion become zero.

g_{eff}=0\Rightarrow T' = \infty \Rightarrow frequency = 0

 

Time period of simple pendulum accelerating downward -

T= 2\pi \sqrt{\frac{l}{g-a}}

- wherein

l= length of pendulum

g= acceleration due to gravity.

a= acceleration of pendulum.

 

 

 


Option 1)

zero

This is correct.

Option 2)

T 

This is incorrect.

Option 3)

\frac{1}{}T

This is incorrect.

Option 4)

None of these

This is incorrect.

Posted by

Aadil

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