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प्रश्न
Give a reason for the following.
Machines are able to make our work convenient.
उत्तर
Machines help us to perform the same amount of work with much less effort than if we did the work manually. They also make our work faster and easier by multiplying the speed or the force applied.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
When is work said to be done by a force?
Define the term ‘work input’ and ‘work output’ in relation to a machine.
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.
Give an example of the following uses of a machine:
to obtain gain in speed
Give an example of the following use of a machine to change the point of application of the force.
Establish a relationship between efficiency, M.A., and V.R.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
Simple machines usually exchange a larger force to move a heavy object.
