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प्रश्न
Answer the following.
What is a machine?
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उत्तर
Tools and objects that help us to perform the same amount of work with much less effort than if we did the work manually, are called machines.
Example: lever, hammer, knife, etc.
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संबंधित प्रश्न
What do you understand by a machine?
Can a machine have an efficiency of 100%? Give a reason to support your answer.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
Write the relation between mechanical advantage, velocity ratio and efficiency.
Give an example of the following uses of a machine:
to obtain gain in speed
Give an example where a machine is used to obtain gain in speed.
Define mechanical advantage (M.A.) 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 cut vegetables.
A pair of scissors is a _____ multiplier.
