Particle Moving in a Horizontal Circle Attached to Two Rods

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A particle attached to two rods, moving in a horizontal circle, will produce forces in the rods which balance vertically and produce a force directed towards the centre of the circle which keep the partilce moving in the circle. We can find the forces in the rods by resolving vertically and horizontally.

Resolving vertically for the particle gives


Applyinghorizontally gives


(2) gives

butso the last equation becomes


Similarly, gives

Now useand divide byto give

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