Question

write about the working of hydraulic Jack?

Answer 1

A jack,screw jack(or)jack screw a mechanical device used as a lifting device 
to lift heavy loads(or) to apply great forces.
                                                                    The most common forms are 
car jack,floor jack,garage jack.Its main principle is to lifts heavy loads.
                                                                             
                                                                       This runs with "PASCAL'S LAW"
                                                
   THANKS FOR ASKING THIS QUESTION,