A spanner is used to loosen a nut by applying a force of 25 N at a distance of 0.2 m from the pivot as shown in the diagram.

1. aCalculate the moment of force. [2]
2. bThe spanner is used to loosen a similar nut by applying a force at a distance of 0.1 m from the pivot. State the effect of applying the force from a distance of 0.1 m. [1]
3. cExplain your answer. [1]
4. dState two examples of levers other than a spanner. [2]

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