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KS3
Ks3 Science
Moments 01
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Q.1
Moments (turning forces) depend on .......
0%
force and distance from the pivot
0%
force and mass
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force and weight
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mass and distance from the pivot
Q.2
The moment will be increased .......
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if the force and distance from the pivot are decreased
0%
if the force and distance from the pivot are increased
0%
if the force is decreased and distance is increased
0%
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.
0%
200 Nm
0%
400 Nm
0%
600 Nm
0%
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.
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200 Nm
0%
700 Nm
0%
1,000 Nm
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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?
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1,700 Nm
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1,800 Nm
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2,200 Nm
0%
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?
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2m
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2.5m
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3m
0%
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)?
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2 Nm
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20 Nm
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200 Nm
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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?
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Double the force
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Quarter of the force
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Half the force
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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?
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5 N
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50 N
0%
100 N
0%
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?
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4 N
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80 N
0%
400 N
0%
800 N
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