Moments Diagrams (Edexcel A-Level Mathematics): Quizzes

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Moments Diagrams
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What is the definition of a moment in mechanics?

Turning effect of a force

Which formula gives the magnitude of a moment?

Moment=Force×Distance\text{Moment} = \text{Force} \times \text{Distance}

What does 'distance' mean in moment calculations?

Perpendicular distance to line of action

On the see-saw diagram, which force has no turning effect about P?

Force B

Which force produces an anticlockwise moment about P?

Force D

For the Jack and Jill seesaw, why does plank weight not cause moment?

Weight acts at pivot M so no moment

Why is the Jill term negative in 35g(2.5−x)−28g(2.5)=035g(2.5-x)-28g(2.5)=0?

Jill's weight gives anticlockwise moment

Which expression equals tension at C (TCT_C)?

TC=(5/6)W+100/3T_C = (5/6)W + 100/3

When taking moments about A which force is eliminated?

TAT_A

Principle of moments for equilibrium states:

Sum clockwise = sum anticlockwise

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