







A lever 
20131109 

From Durgesh: A farmer uses a 2 m long lever to lift large rocks from the ground of his field . He places a fulcrum 20cm from the rock end of the lever and then stands on the other end, levering out the rock. If the farmer weighs 100 kg , what is the heaviest mass of the ro ck that he can lift using this method? (how to solve) Answered by Penny Nom. 





Balancing on a fulcrum (net torque and equilbrium) 
20080115 

From Eric: If I have a 4" bar that has no weight value with a 275lb. weight on one side
and a 125lb. weight on the other side what would be the folcrum point? Please
keep the answer very simple. Also is there a fixed equation to figure folcrum points?
Is there an equation for if the 4" bar had a weight value? Answered by Stephen La Rocque. 





Levers 
19990113 

From Lane Campbell: 1. Solve for x or y. (a)
<4m><4m><xm >
_____________________________________________________
^ ^ ^ ^
25N 5N ^ 15N
Answered by Jack LeSage. 

