Calculating Moments (AQA GCSE Physics): Quizzes

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Calculating Moments
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What is the formula for calculating a moment?

M=FdM = Fd

What is the unit of moment?

Newton-metres (Nm)

For a balanced surface on a pivot, which statement is true?

Anticlockwise moment = Clockwise moment

Calculate the moment of a 4N4N force acting 0.4m0.4m from a pivot.

1.6Nm1.6 Nm

Which equation applies to a balanced system with two forces?

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

The force must be at what angle to the distance from the pivot?

Perpendicular

If F2=8NF_2 = 8N, d2=20md_2 = 20m, and F1=25NF_1 = 25N, calculate d1d_1 for balance.

6.4m6.4m

Rearranging F1×d1=F2×d2F_1 \times d_1 = F_2 \times d_2 to find d1d_1 gives:

d1=(F2×d2)/F1d_1 = (F_2 \times d_2)/F_1

What distance would give a moment of 1.6Nm1.6 Nm with a 4N4N force?

0.4m0.4m

A 25N25N force at 6.4m6.4m balances an 8N8N force. What is the 8N8N force distance?

20m20m

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