Question

which of the following defines hydraulics? a) force pushing the piston against the brake fluid. b) the resistance of two objects moving against each other. c) science of using liquids to perform work. d) the ability of the tires to supply friction.

Explanation:

Hydraulics is the branch of science dealing with the use of liquids (like water or oil) to transmit force and perform work (e.g., in hydraulic systems). Option A describes a hydraulic action example, not the definition. Option B is friction. Option D relates to tire friction. Only C defines hydraulics.

Answer:

C) Science of using liquids to perform work.