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The figure shows an overhead view of a horizontal bar that can pivot about the point indicated. Two horizontal forces act on the bar, but the bar is stationary. If the angle between the bea and force $F_{2}$ is now decreased from the initial $90 °$ and the bar is still not turned, then:

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$F_{2} b e m a d e s m a l l e r$

none of the above

$F_{2} b e r e m a i n a s s u c h$

$F_{2} b e m a d e l a r g e r$

answer is B.

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Detailed Solution

$F_{1} r_{1} - F_{2} r_{2} \sin θ = 0$

So if $θ$ decreases, $F_{2}$ should be increased.

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