Mathematics, 24.12.2020 19:00, tony7135

a crowbar 2 metres long is used to lift a rock weighing 800 newtons .If the fulcrum is 0.25 metre, from where the bar touches the rock, how much effort must be applied to move the rock

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a crowbar 2 metres long is used to lift a rock weighing 800 newtons .If the fulcrum is 0.25 metre, f...