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प्रश्न
What is the principle on which a machine works?
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उत्तर
Principle of a Machine: The work output of a machine is equal to the work input.
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संबंधित प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
What is the efficiency of an ideal machine?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
Give an example of the following use of a machine to change the direction of force.
A cook used a ‘fire tong pair’ of length 32 cm. to lift a piece of burning coal of mass 500 g. If he applies his effort at a distance of 8 cm from the fulcrum, what is his effort? Assume friction etc. to be absent. Also, obtain values of the M.A. and the V.R. of this ‘machine’.
Classify the following as a lever, a pulley and an inclined plane:
A slide
What is meant by simple machines?
Simple machines usually exchange a larger force to move a heavy object.
