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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three point charges are arranged along the x-axis charge q1 -485 nc is located at x1 0205m and charge q2 275 nc is at
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