Irrespective of shape of vessels or containers, a connected liquid maintains same level in all containers.
This happens to maintain same pressure at a given depth. As the pressure depends on depth of a point from the liquid surface.
Which is always constant for a machine of given design: MA or VR ? Ans: VR remains constant for a machine of given design as it depends on the distances moved by the load and effort but MA can vary due to the friction developed between the moving parts of the machine.
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