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Grades 6, 7 and 8 - Science - Middle School - Moments
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Avg score: 56% • Most missed: “The moment will be increased .......”

Pushing or pulling the handle of a wrench connected to a nut or bolt produces a moment (turning force) that loosens or tightens the nut or bolt. In the field of Science, forces can be used to turn objects about a pivot (fixed point).
 

Grades 6, 7 and 8 - Science - Middle School - Moments
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10 Questions

1. A friend joins the two children (Q5) 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?
2. A spanner is 20cm long. A force of 10N is applied to undo a bolt. What is the moment (turning force)?
3. Amir weighs 500N. He sits on a see-saw 200cm from the pivot (center). Calculate the moment caused by Amir.
4. Jane weighs 400N. She sits on a see-saw 1.5m from the pivot (center). Calculate the moment caused by Jane.
5. A 40cm spanner is used to produce the same turning force as Q7. What force would be needed?
6. Jane weighs 400N. She sits on a see-saw 1.5m from the pivot (center). Calculate the moment caused by Jane.
7. A friend joins the two children (Q5) 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?
8. Moments (turning forces) depend on .......
9. Amir weighs 500N. He sits on a see-saw 200cm from the pivot (center). Calculate the moment caused by Amir.
10. The moment will be increased .......

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