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प्रश्न
Why is this so machines have to be maintained?
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उत्तर
A machine is composed of many parts. These parts rub against one another when in use. Due to this, these parts wear out with time. Also, soil and dust create more friction between the parts, which further deteriorates their condition. Even some parts get affected by weather and thus rust and erode. Because of these factors, the machine can become useless if proper care is not given to it. So, it is very necessary that we have proper equipment and methods for the maintenance of machines. Thus, machines should be sent for maintenance checks at fixed intervals of time to ensure their proper working.
संबंधित प्रश्न
What care would you take to increase the life span of a machine which you use?
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
What is an ideal machine?
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple 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.
Write an expression for the mechanical advantage of an inclined plane.
Classify the following as a lever, a pulley and an inclined plane:
Scissors
What is a lever?
Why is this so traveller’s bags have wheels?
The idea of a simple machine originated with the Greek philosopher Archimedes.
