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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
State whether the following statement is True or False.
A boy does work while pushing a wall.
State whether the following statement is True or False.
A machine performs work by itself.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Write the relation between mechanical advantage, velocity ratio and efficiency.
Define Velocity Ratio
Define mechanical advantage (M.A.) of the machine.
Give an example of the following use of a machine to change the direction of force.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
What is a lever?
Simple machines usually exchange a larger force to move a heavy object.
