A crowbar 2m long is used to lift a rock 800n if the
a crowbar 2m long is used to lift a rock 800n. if the fulcrum is 0.25m from where the crowbar touches the rock, how much effort must be applied to move the rock?
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a crowbar 2m long is used to lift a rock 800n if the fulcrum is 025m from where the crowbar touches the rock how much
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