Answer: 349.99 Newton must be exerted on the small piston
Explanation:
In changing a tire a hydraulic jack lift 7468 newtons on its large piston which has an area of 28.27 cm squared. Pressure is expressed as force/area
Pressure exerted and transmitted to the smaller piston is
7468/28.27 = 264.14N/cm²
If the small piston has an area of 1.325 cm squared, the force that would be exerted on the smaller piston is
Force = pressure × area
= 264.14 × 1.325 = 349.99 Newton