Question

why 2 pi is used in formula of simple pendulum

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Answer 1

HEY MATE HERE IS YOUR ANSWER

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Simple pendulum = 2TT

Because when you deflect the pendulum the mass moves along a circular arc. When you let go the mass swings back and forth it has a period it has lot look like simple harmonic motion.

If we figure out the force acting on the mass as it deflect we find from trigonometry that the force is not proportional to the deflection that way it would have to if we wanted to get SHM. Instead the force us proportional to the sine.

Hope it will help you

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Answer 2

Hey mate ^_^

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Answer:
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=> The force that moves the bob is proportional to the sine of the angle, not the angle itself.

=> When you deflect the pendulum the mass moves along a circular arc.

=> The bob is constrained to move along a circular arc.

=> When you let go the mass swings back.

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