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प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
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उत्तर
Work input is work done on a machine equal to the effort force times the distance through which the force is applied.
Work output is work that is done by a machine and equals resistance force times the distance through which the force is applied.
For an ideal machine, the work output is equal to the work input, i.e., the efficiency.
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संबंधित प्रश्न
Answer the following.
What is a machine?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Write the relation between mechanical advantage, velocity ratio and efficiency.
What is the efficiency of an ideal machine?
Define mechanical advantage (M.A.) of the machine.
Classify the following as a lever, a pulley and an inclined plane:
A staircase
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
Why is this so machines have to be maintained?
Name some simple machines.
