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3.4.1 Moments in static contexts (A-level only)

Card 1 of 20

Why does a force acting through a pivot have zero moment about it?

A

The weight of an object of mass mmm is W=mg\boxed{W=mg}W=mg​, where g=9.8 m s−2g=9.8\text{ m s}^{-2}g=9.8 m s−2 unless stated otherwise.

B

For a force FFF acting at distance rrr and angle θ\thetaθ to a rod, the moment magnitude is M=rFsin⁡θ\boxed{M=rF\sin\theta}M=rFsinθ​.

C

49 N49\text{ N}49 N

D

Its perpendicular distance from the pivot is zero.

Card 1 of 20

3.4.1 Moments in static contexts (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /3.4.1 Moments in static contexts (A-level only)

20 flashcards on AQA A Level Maths 3.4.1 Moments in static contexts (A-level only): the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

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