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प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
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उत्तर
The useful work done by an actual machine is always less than the work done on the machine.
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संबंधित प्रश्न
State whether the following statement is True or False.
In an ideal machine, work done on load is equal to the work done by effort.
Can a machine have an efficiency of 100%? Give a reason to support your answer.
Answer the following.
What is a machine?
The diagram below shows a wheel barrow. Mark position of fulcrum F and draw arrows to show the directions of load L and effort E. What class of lever is the whell barrow? Give one more example of the same class of lever.
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Classify the following as a lever, a pulley and an inclined plane:
A slide
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 meant by simple machines?
______ help us to make work easier.
The idea of a simple machine originated with the Greek philosopher Archimedes.
