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प्रश्न
What do you understand by a machine?
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उत्तर
A machine is a device that allows us to do work with less effort. Machines make our work easier to do. Machines have made our lives comfortable and faster.
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संबंधित प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Comment on the statement ‘The mechanical advantage of a machine is greater than 1’. Give an example of a lever mechanical advantage is:
(i) greater than 1.
(ii) Equal to 1.
Give an example of the following use of a machine to change the direction of force.
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Classify the following as a lever, a pulley and an inclined plane:
An axe
Classify the following as a lever, a pulley and an inclined plane:
A crane
What is meant by simple machines?
Name some simple machines.
