SOLUTION: Bobby can exert a force of 190 Ib. How heavy a rock can he lift if he uses a bar that is 6 feet long and places the fulcrum so that it is 9 inches from the rock?

SOLUTION: Bobby can exert a force of 190 Ib. How heavy a rock can he lift if he uses a bar that is 6 feet long and places the fulcrum so that it is 9 inches from the rock?

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Question 321451: Bobby can exert a force of 190 Ib. How heavy a rock can he lift if he uses a bar that is 6 feet long and places the fulcrum so that it is 9 inches from the rock?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
190*5.25=.75x
997.5=.75x
x=997.5/.75
x=1,330 lbs. ans. for the amount of force to lift the rock.
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