\( F_{1} \) and \( F_{2} \) are the minimum and maximum forces needed to keep a body on a rough ...

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\( F_{1} \) and \( F_{2} \) are the minimum and maximum forces needed to keep a body on a rough inclined plane stationary. If \( \theta \) be the angle of inclination of the surface, so that \( \tan \theta=2 \mu \). Find the ratio of \( F_{1} \) and \( F_{2} \).
(a) \( 1: 2 \)
(b) \( 2: 1 \)
(c) \( 1: 3 \)
(d) \( 3: 1 \)
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