4) In a hydraulic lift in a car-repair shop, the diameter of the small piston is 22 cm, and the diameter of the large piston is 1.98 m. A 1470-kg car (including the platform) is to be lifted up on the large piston. a) How hard must a person push down on the small piston? Express your answer in Newtons, and also in lbs. [1 lb = 4.45 Newtons] b) If each stroke that the person applies (on the small piston) presses the piston down by 54 cm, how many strokes in a row does the person have to apply, in order to lift up the car by a total distance of 24 cm?

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Fluid Pressure

The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.

Gauge Pressure

Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.