Moments, levers and gears

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Question 18

Easy

An L-shaped bracket is free to rotate in a vertical plane about a fixed frictionless hinge (pivot) at its corner $O$ , as shown in the diagram. The vertical arm of the bracket is $OA\,$ and the horizontal arm is $O B$ . Four coplanar forces, $F1\mathbf{F}_1$ , $F2\mathbf{F}_2$ , $F3\mathbf{F}_3$ , and $F4\mathbf{F}_4$ , are applied to the bracket in the directions indicated.

L-shaped bracket with applied forces

Which of these forces will produce a non-zero turning effect (moment) about the pivot $O$ ?

Force $F1\mathbf{F}_1$

Force $F2\mathbf{F}_2$

Force $F3\mathbf{F}_3$

Force $F4\mathbf{F}_4$

Moments, levers and gears

Question 18

Moments, levers and gears Questions

Moments, levers and gears

Question 18

Moments, levers and gears Questions