Please help, I'm an 11 grader, working on small machines. I don't know how to do this prob

timer Asked: Mar 26th, 2015

Question Description

A lever is used to lift an 800 N rock. the rock sits on one end of the lever, 2 meters from the fulcrum. A downward force is exerted on the other end of the the lever, 4 meters from the fulcrum. 

(a) How far must the other end be lowered to lift the rock a distance of 20 cm?

(b) If the lever is an ideal machine, what force must be exerted on the other end of the lever to lift the rock?

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