Scissor linkage: dynamic analysis

[serbring]

Hi guys,

I have a scissor linkage and I should calculate the force F for keeping the system in equilibrium in a specific position. The force must be applied in the the middle joint as you can see in the following picture:

http://imageshack.us/photo/my-images/810/scissordisegno.png/

L is the arms lenght, instead a is the horizontal distance between the two joints. How can I calculate this force for a specific height and supported weight? Any suggestions, or links are appreciated.

Thanks

 

[Studiot]

Have you tried a forum search?

https://www.physicsforums.com/showthread.php?t=492530&highlight=lifting+tongs&page=2

 

[serbring]

Have you tried a forum search?

https://www.physicsforums.com/showthread.php?t=492530&highlight=lifting+tongs&page=2

Hi Studiot,

thanks for your reply, probably I have searched the wrong terms. Thanks

I'll take a look to your link

 

[Studiot]

If this is homework/coursework show us your initial attempt for more help.

go well