Problem analysis: Solution: Because the ratio of the acting areas of the small piston and the large piston is 1: 10, according to Pascal's principle, the pressure on the large and small pistons is equal at this time, that is, P 1 =P 2.

∫p =，

∴ = ,

∴ The magnitude of the force F 2 generated on the big piston is:

F 2 = = = 1000N。

Comments: This question examines students' mastery and application of pressure formula and Pascal's principle. With the memory of "small area, small force and large area", mistakes caused by inversion can be prevented.