(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

Distinguish between speed and velocity.

Define one pascal (Pa), the S.I. unit of pressure.

State Pascal's law of transmission of pressure.

Name two applications of Pascal's law.

Explain the principle of a hydraulic machine. Name two devices which work on this principle.

Name and state the principle on which a hydraulic press works. Write one use of hydraulic press.

Draw a simple diagram of a hydraulic jack and explain its working.

Explain the working of a hydraulic brake with a simple labelled diagram.

In a hydraulic machine, a force of 2 N is applied on the piston of area of cross section 10 cm². What force is obtained on its piston of area of cross section 100 cm² ?

What should be the ratio of area of cross section of the master cylinder and wheel cylinder of a hydraulic brake so that a force of 15 N can be obtained at each of its brake shoe by exerting a force of 0.5 N on the pedal ?

The areas of pistons in a hydraulic machine are 5 cm² and 625 cm². What force on the smaller piston will support a load of 1250 N on the larger piston? State any assumption which you make in your calculation.