Rahul wants to lift a heavy rock using a long crowbar (Class I lever). To make his work easier and use less force, where should he place the fulcrum?

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• A Exactly in the middle of the crowbar.
• B As close to the rock (load) as possible.
• C As close to his hands (effort) as possible.
• D The position of the fulcrum does not change the effort needed.

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Answer: B. As close to the rock (load) as possible.

The longer the effort arm (distance from fulcrum to hands), the less force you need!

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