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प्रश्न
Identify and mention the types of simple machines.
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 |
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| ______ | ______ | _______ |
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 |
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| ______ | ______ | ______ |
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उत्तर
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| Wedge | Inclined plan | Lever |
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| Wheel and axle | Pulley | Screw |
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संबंधित प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
Select the correct alternative:
For an ideal machine, the efficiency is
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
Why is a machine not 100% efficient?
Establish a relationship between efficiency, M.A., and V.R.
A cook used a ‘fire tong pair’ of length 32 cm. to lift a piece of burning coal of mass 500 g. If he applies his effort at a distance of 8 cm from the fulcrum, what is his effort? Assume friction etc. to be absent. Also, obtain values of the M.A. and the V.R. of this ‘machine’.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
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.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
