Asked by Tiffany
I have this word problem that I can't figure out. The problem is:
A 15 lb weight is positioned 10 in. form a fulcrum. At what distance from the fulcrum must a 12 lb weigt be positioned to keep the scale balanced?
The substitute that I had today said that the 12 lb. weight would have to be further away from the fulcrum than the 15 lb., but my mom says the opposite.
A 15 lb weight is positioned 10 in. form a fulcrum. At what distance from the fulcrum must a 12 lb weigt be positioned to keep the scale balanced?
The substitute that I had today said that the 12 lb. weight would have to be further away from the fulcrum than the 15 lb., but my mom says the opposite.
Answers
Answered by
Reiny
Sorry, even moms are sometimes wrong
to balance, the (mass x distance) must be equal on each side for a balance
so,
12x = 10x15
x = 12.5 inches
to balance, the (mass x distance) must be equal on each side for a balance
so,
12x = 10x15
x = 12.5 inches
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