If the length of a simple pendulum is doubled keeping its amplitude constant its energy will be

  • Option 1)

    Unchanged

  • Option 2)

    Doubled

  • Option 3)

    Four times

  • Option 4)

    Halved

 

Answers (1)

As we learnt in

Time period of oscillation of simple pendulum -

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

- wherein

l = length of pendulum 

g = acceleration due to gravity.

 

 Halved


Option 1)

Unchanged

This solution is incorrect.

Option 2)

Doubled

This solution is incorrect.

Option 3)

Four times

This solution is incorrect.

Option 4)

Halved

This solution is correct.

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