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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
Scissors
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उत्तर
Scissors – A lever
संबंधित प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
Give a reason for the following.
Machines are able to make our work convenient.
What do you understand by a simple machine?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
Define mechanical advantage (M.A.) of the machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
What is the efficiency of a machine?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
Which machine will you use to do the following work? Write their type.
To cut vegetables.
