How does lengthening the effort arm of a lever affect it?

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Question

How does lengthening the effort arm of a lever affect it?

Accepted Answer

It increases the mechanical advantage, so less effort is needed to move the load — Award 1 mark. Mechanical advantage = effort arm ÷ load arm, so a longer effort arm gives a larger value. The fulcrum stays at the joint, and both arm lengths matter.

Answer

It moves the fulcrum to the end of the lever

Answer

It increases the mechanical advantage, so less effort is needed to move the load

Answer

It has no effect, because only the load arm matters

Answer

It decreases the mechanical advantage, so more effort is needed

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