A dentist's chair of mass 209.0 kg is supported by a hydraulic lift having a large piston of cross-sectional area 1492.0 cm2. The dentist has a foot pedal attached to a small piston of cross-sectional area 79.0 cm2.

What force must be applied to the small piston to raise the chair?

What distance must the small piston be moved to raise the chair 0.15 m?

Question

A dentist's chair of mass 209.0 kg is supported by a hydraulic lift having a large piston of cross-sectional area 1492.0 cm2. The dentist has a foot pedal attached to a small piston of cross-sectional area 79.0 cm2. 

What force must be applied to the small piston to raise the chair? 


What distance must the small piston be moved to raise the chair 0.15 m?

anonymous · Answer

Answers should be:
108.6 N for the first question and 2.83 m for the second one. 
Can someone show me how to work these problems ?