physics
posted by lulu .
a lever is 5 m long. The distance from the fulcrum to the weight to be lifted is 1 m. If a 3000 N rock is to be lifted, how much force must be excerted on the lever?

F1*d1=F2*d2
F1=3000 d1 is 1m
F2=? d2 is 4m
solve for F2 
750N
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