- #1

MatinSAR

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- Homework Statement
- The period of a simple pendulum with an iron ball is T. If we put a magnet under it, its period becomes T/2. What is F/mg equal to?(F is the force that is exerted by the magnet.)

- Relevant Equations
- T = 2π Square root of√L/g

Hi ...

I have answered this question and I think that F/mg equals 3.

But I've asked it from someone and he told me that F/mg is 4.

Can someone help me find out which one is correct ???

My answer :

I have answered this question and I think that F/mg equals 3.

But I've asked it from someone and he told me that F/mg is 4.

Can someone help me find out which one is correct ???

My answer :