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प्रश्न
Name some simple machines.
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उत्तर
Simple machines are pulley, wedge, inclined plane, screw, lever, wheel, and axle.
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संबंधित प्रश्न
When is work said to be done by a force?
What do you understand by a machine?
Name six simple machines. Give an example of each machine.
What care would you take to increase the life span of a machine which you use?
Give a reason for the following.
Machines are able to make our work convenient.
What is an inclined plane?
Fig. shows a spade. It is being used to lift soil weighing 30N from the ground.
(a) Mark the direction of the least force on the handle necessary to keep the spade balanced.
(b) Calculate the least force on the handle necessary to keep the spade balanced (the weight of the spade is negligible).
(c) If the left hand was move towards the soil on the spade, would the force on the handle necessary to keep the soil balance the greater or less? Give a reason for your answer.
(d) To which class of lever does the spade belong?
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Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.
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Simple machines usually exchange a larger force to move a heavy object.
