Calculating Moments (AQA GCSE Physics): Flashcards

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Calculating Moments
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Formula for moment

M=FdM = Fd

Variables in M=FdM = Fd

MM=moment, FF=force, dd=distance from pivot

Unit of moment

Nm (Newton-metres)

Condition for balanced system (moments)

Total anticlockwise moment = Total clockwise moment

Balanced equation with two forces on pivot

F1×d1=F2×d2F_1 \times d_1 = F_2 \times d_2

Direction of force relative to distance (moment calc)

Force must be perpendicular to distance

Moment of 4N4N force at 0.4m0.4m from pivot

1.6Nm1.6 Nm

Find xx: 25N×x=8N×20m25N \times x = 8N \times 20m

6.4m6.4m

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