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Frictional Force

If we have tw...

Question

If we have two gear wheels of the same size, one of which rotates once around the other,which is stationary,how often will the first one turn around its own axle?

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Solution

The outer wheel that rotates around the inner wheel rotates once in itsown axis to compleat one rotation around the inner wheel
because both the wheels are of same radius
so the circumfrance of the inner wheel is equal to the circumfrance of outer wheel

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