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Distinguish between speed and velocity.
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Define one pascal (Pa), the S.I. unit of pressure.
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State Pascal's law of transmission of pressure.
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Name two applications of Pascal's law.
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Explain the principle of a hydraulic machine. Name two devices which work on this principle.
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Name and state the principle on which a hydraulic press works. Write one use of hydraulic press.
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Draw a simple diagram of a hydraulic jack and explain its working.
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Explain the working of a hydraulic brake with a simple labelled diagram.
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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 ?
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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 ?
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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.
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