A rod P of length 1 m, is hinged at one ...

A rod P of length 1 m, is hinged at one end A there is a ring attached to the other end. Another long rod Q is hinged at B and it passes through the ring. The rod P is rotated about an axis which is perpendicular to the plane is which both rods are present and the variations between the angles `theta` and `phi` are plotted as shown. The distance between the hinges A and B is

3 m

1 m

2 m

`2sqrt2m`

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