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Classify the following as a lever, a pulley and an inclined plane:
An axe
Concept: undefined >> undefined
Classify the following as a lever, a pulley and an inclined plane:
A crane
Concept: undefined >> undefined
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Classify the following as a lever, a pulley and an inclined plane:
A knife
Concept: undefined >> undefined
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Concept: undefined >> undefined
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
Concept: undefined >> undefined
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Concept: undefined >> undefined
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
Concept: undefined >> undefined
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
Concept: undefined >> undefined
Which machine will you use to do the following work? Write their type.
To cut vegetables.
Concept: undefined >> undefined
What are the types of galaxies?
Concept: undefined >> undefined
Which machine will you use to do the following work? Write their type.
To draw water from a well.
Concept: undefined >> undefined
Which celestial bodies does a galaxy include?
Concept: undefined >> undefined
Which machine will you use to do the following work? Write their type.
To hold a papad for roasting it.
Concept: undefined >> undefined
What is meant by simple machines?
Concept: undefined >> undefined
Why is this so traveller’s bags have wheels?
Concept: undefined >> undefined
Why is this so machines have to be maintained?
Concept: undefined >> undefined
Write the answer in your own words.
What is meant by vibration?
Concept: undefined >> undefined
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.
Concept: undefined >> undefined
What will happen if the number of vehicles and factories in your surroundings increases?
Concept: undefined >> undefined
