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प्रश्न
Why is a machine not 100% efficient?
उत्तर
In actual machine there is always some loss of energy due to friction and weight of moving parts,
thus the output energy is always less than the input energy.
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संबंधित प्रश्न
When is work said to be done by a force?
What do you understand by a machine?
A machine is 75% efficient’. What do you understand by this statement?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Define Velocity Ratio
Define mechanical advantage (M.A.) of the machine.
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.
How does a machine work?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
Simple machines makes work easier by trading ______ for force.
