1In a hydraulic lift, the cross-sectional areas of the small piston and the large piston are 0.25 m² and 5 m² respectively. Calculate the force required to lift a car of mass 1200 kg using the lift.
2Why does the large piston of a hydraulic machine receive a larger force than the one applied on the small piston?
3How does the hydraulic lift in a dentist's chair raise the patient?
4Explain how a hydraulic brake stops a four-wheeled vehicle.
5How is the hydraulic brake of a two-wheeler different from that of a four-wheeler?
6Why are the pistons of a hydraulic brake fitted so that the cylinders are air-tight?
7What are the jobs of the bottom valve and the top valve in a hydraulic jack?
8Describe what happens inside a hydraulic jack when its lever is pushed down and then pulled up.
9The pumping piston of a hydraulic jack has an area of 0.001 m² and the lifting piston has an area of 0.05 m². What force on the pumping piston will hold up a load of 10000 N?
10Where is the object placed in a hydraulic press, and what is the press used for?