Question

what is effort arm? how change in effort arm affects the effort required to lift the object?

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Answer 1

The effort arm (or arm of applied force) is the portion of the lever to which we apply the effort, or input force. ... In a first-class lever, the effort arm and load arm are located on opposite sides of the fulcrum, and effort is applied in the same direction as the force exerted by the load.

The length of the left arm decreases the amount of effort force required to lift the load increases . The position of the fulcrum and the length of the effort and load arms in a second class lever affect mechanical advantage.

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Answer 2

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