Physics 5054 · O Level · Turning effect of forces

Turning effect of forces — practice question

A length of thread is joined to a lamina at point P, as shown in the diagram. The lamina is able to rotate freely around point Q. The tension in the thread is $F$. What is the moment of $F$ about Q?

A$F w$
B$F x$
C$F y$
D$F z$

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