force in levers

Forces with levers :

Sponsored Links

A lever is a mechanism that can be used to exert a large force over a small distance at one end of the lever by exerting a small force over a greater distance at the other end.

In general the effort force can be expressed as

F_e = F_l d_l / d_e         (1)
where
F_e = effort force (N, lb)
F_l = load force (N, lb) (note that weight is a force)
d_l = distance from load force to fulcrum (m, ft)
d_e = distance from effort force to fulcrum (m, ft)

http://www.explainthatstuff.com/toolsmachines.html
http://www.engineeringtoolbox.com/levers-d_1304.html
http://www.google.com.co/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjSxeyoy7rOAhXBdSYKHa11CHAQjRwIBw&url=http%3A%2F%2Fwww.slideshare.net%2Fphysicsgalle%2Fbalanced-forces-ppt&psig=AFQjCNHpdXkvSia6OaoGupzrX7gtu0JCbw&ust=1471046909708685