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प्रश्न
What do you understand by a machine?
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उत्तर
A machine is a device that allows us to do work with less effort. Machines make our work easier to do. Machines have made our lives comfortable and faster.
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संबंधित प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
Answer the following.
What do you understand by a complex machine?
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
Give an example where a machine is used to obtain gain in speed.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
Scissors
Which machine will you use to do the following work? Write their type.
To cut vegetables.
Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.
Ravi and Savita sit on a seesaw in a garden. In the meantime, a gardener is trimming trees in the garden. He puts the leaves and other garbage in the wheelbarrow. Later, Ravi gets thirsty and he buys lemon sherbet. The sherbet seller cuts the lemon and squeezes it using a lemon squeezer. He puts small pieces of ice in the glass with the help of the tongs.
Identify and mention the types of simple machines.
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 |
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| ______ | ______ | _______ |
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| ______ | ______ | ______ |
