SOLUTION: Two children on a seesaw that is 1o ft long. One child weighs 65 lb. The other child weighs 80lb. How far from the eighty-pound child should the fulcrum of the seesaw be placed so
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Question 71390: Two children on a seesaw that is 1o ft long. One child weighs 65 lb. The other child weighs 80lb. How far from the eighty-pound child should the fulcrum of the seesaw be placed so the seesaw balances?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Two children on a seesaw that is 1o ft long. One child weighs 65 lb. The other child weighs 80lb. How far from the eighty-pound child should the fulcrum of the seesaw be placed so the seesaw balances?
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weight 1/weight 2 = distance 2/distance 1
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Place the fulcrum "x" ft from the 65 lb child.
Then the fulcrum must be "10-x" ft from the 80 lb child.
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65/80 = (10-x)/x
65x = 80(10-x)
65x = 800-80x
145x = 800
x=5.52 ft (distance of fulcrum from 65 lb child)
10-x= 4.48 ft (distance of fulcrum from 80 lb child)
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Cheers,
Stan H.
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