Q.1
Moments (turning forces) depend on .......
  • force and distance from the pivot
  • force and mass
  • force and weight
  • mass and distance from the pivot
Q.2
The moment will be increased .......
  • if the force and distance from the pivot are decreased
  • if the force and distance from the pivot are increased
  • if the force is decreased and distance is increased
  • if the force is increased and distance is decreased
Q.3
Jane weighs 400 N. She sits on a see-saw 1.5 m from the pivot (centre). Calculate the moment caused by Jane.
  • 200 Nm
  • 400 Nm
  • 600 Nm
  • 800 Nm
Q.4
Amir weighs 500 N. He sits on a see-saw 200 cm from the pivot (centre). Calculate the moment caused by Amir.
  • 200 Nm
  • 700 Nm
  • 1,000 Nm
  • 10,000 Nm
Q.5
Two children weigh 300 N and 400 N, they sit 2 m and 3 m away from the pivot (centre) on the same side of the see-saw. What is their total moment?
  • 1,700 Nm
  • 1,800 Nm
  • 2,200 Nm
  • 3,500 Nm
Q.6
Two children are sitting on the same side of a see-saw. Their total moment is 1800 Nm. A friend joins the two children in the play area and sits on the other end of the see-saw. He weighs 600N. How far from the pivot must he sit to balance the see-saw?
  • 2m
  • 2.5m
  • 3m
  • 5m
Q.7
A spanner is 20 cm long. A force of 10 N is applied to undo a bolt. What is the moment (turning force)?
  • 2 Nm
  • 20 Nm
  • 200 Nm
  • 2,000 Nm
Q.8
A 40 cm long spanner is used to produce the same turning force as a 20 cm long spanner. What force would be needed for the 40 cm long spanner compared to the force used on the 20 cm long spanner?
  • Double the force
  • Quarter of the force
  • Half the force
  • The same force
Q.9
A moment of 50 Nm is needed to open a jar using a pair of pliers designed to make opening jars easier. If the pliers are 10 cm long. What force is needed?
  • 5 N
  • 50 N
  • 100 N
  • 500 N
Q.10
A moment of 80 Nm is needed to undo a wheel nut. The spanner is 20 cm long. What force is needed?
  • 4 N
  • 80 N
  • 400 N
  • 800 N
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