What force should be applied to a small piston with a cross-sectional area of 40 cm2 when pressing a part

What force should be applied to a small piston with a cross-sectional area of 40 cm2 when pressing a part if a large piston with an area of 800 cm2 can withstand a force of 400N?

F2 \ F1 = S2 \ S1, therefore, we need to divide the second area by the first: 800: 40 = 20. The force that a piston with an area of 800 cm2 can withstand is 400N. We need to find out how much force should be applied to the other piston, so we do it like this: 400: 20 = 20.

Answer: the force that must be applied to a piston with a cross section of 40 cm2 is equal to 20N.