Q.1
What is a moment?
  • A turning effect of a force
  • The mass of an object at a point
  • The distance of a mass from a pivot
  • When a system is in equilibrium
Q.2
What is the formula for the size of a moment?
  • M = F x d
  • F = M x d
  • M = F⁄d
  • d = M x F
Q.3
What does d in the above equation stand for?
  • Parallel distance from line of action to the pivot
  • Perpendicular distance from line of action to the pivot
  • Distance of the plane
  • Distance between two masses
Q.4
  • Clockwise moment is twice as large as anti-clockwise moment
  • Clockwise moment is three times as large as anti-clockwise moment
  • Clockwise moment is half as large as anti-clockwise moment
  • Clockwise moment is exactly equal in magnitude to the anti-clockwise moment
Q.5
What is the size of a moment if F = 10 N and d = 125 cm?
  • 10.125 N m
  • 1250 N m
  • 12.5 N m
  • 1.25 N m
Q.6
A see-saw is balanced on a pivot with two children on it. One child is sitting 1.5 m to the left of the pivot and has a mass of 50 kg. Another child of mass 30 kg is sitting on the right hand side of the pivot. What distance away from the pivot is the child on the right of the pivot?
  • 30 cm
  • 1.5 m
  • 2.5 m
  • Impossible to say without knowing the length of the see-saw
Q.7
What is the force that creates a moment of 10 N m when it is applied 0.25 m from the pivot?
  • 30 N
  • 40 N
  • 50 N
  • 60 N
Q.8
If the point of application of the force was moved further away from the pivot, what would be the effect on the moment?
  • The moment would be greater because the distance is greater
  • The moment would remain the same because the force hasn't changed
  • The moment would be smaller because it is further away and therefore has less effect on the pivot
  • More information is needed to be able to answer this question
Q.9
A plank of wood is balanced on a pivot. One mass of 10 kg is then placed 1 m to the left of the pivot on the wood. What weight needs to be placed 0.5 m to the right of the pivot for the wood to still be balanced?
  • 10 kg
  • 20 kg
  • 10 N
  • 200 N
Q.10
Which of the following is an example of the principle of moments being utilized?
  • Lifting a book
  • A rock falling
  • A crowbar being used to lift a drain cover
  • A USB stick
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