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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
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Why is a machine not 100% efficient?
Write the relation between mechanical advantage, velocity ratio and efficiency.
Define Velocity Ratio
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
Classify the following as a lever, a pulley and an inclined plane:
An opener
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
Simple machines makes work easier by trading ______ for force.
