- #1
KatieLynn
- 65
- 0
Work input/output, efficient probelm, just need someone to check my work :)
Because there is very little friction, the lever is an extremely efficient simple machine. Using a 90% efficient lever, what input work is required to lift an 18kg mass through a distance of 0.5m?
(Fout/Fin)/(Din/Dout)
(Fout/Fin)/(Din/Dout)
(176.6N/Fin)/(Din/.5m)=.9
so you get (Fin)(Din)=98.1 which FD is work so 98.1J is the answer correct?
Homework Statement
Because there is very little friction, the lever is an extremely efficient simple machine. Using a 90% efficient lever, what input work is required to lift an 18kg mass through a distance of 0.5m?
Homework Equations
(Fout/Fin)/(Din/Dout)
The Attempt at a Solution
(Fout/Fin)/(Din/Dout)
(176.6N/Fin)/(Din/.5m)=.9
so you get (Fin)(Din)=98.1 which FD is work so 98.1J is the answer correct?