How Do You Calculate the Lift Force of a Jack Screw?

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To calculate the lift force of a jack screw given the force exerted on it, one can use either a free body diagram (FBD) approach or apply kinematics with the concept of virtual work. Both methods are valid for analyzing the mechanics involved in the system. The choice between these approaches depends on the specific details of the problem and personal preference. A clear understanding of statics principles is essential for accurate calculations. Properly applying these methods will yield the necessary lift force for the jack screw.
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Homework Statement


What formula would I use to calculate the lift force of a Jack Screw
when I know the force exerted on the linear screw? It would be similar to the Jack used to lift a car.

Homework Equations

The Attempt at a Solution

 
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Well, you could draw FBDs for the links and set it up as a conventional statics problem,
or,
you could do some kinematics and use virtual work. Your choice!
 
Thanks Dr.D
 
Here is a FB of my linkage.
 

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