The fulcrum of a first-class lever divides its 9.0 m arm into two sections—a 6.0 m arm and a 3.0 m arm. You place a rock weighing 98.1 N on the 3.0 m end. How much force do you need to exert on the 6.0 end to balance the lever? a)49 N b)200 N c)880 N d)1,800 N

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