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प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
विकल्प
greater than unity
less than unity
equal to unity
depends on the value of load
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उत्तर
equal to unity
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संबंधित प्रश्न
Write an expression for the mechanical advantage of an inclined plane in terms of its length I and vertical height h.
The mechanical advantage of an inclined place is always:
(a) less than 1
(b) equal to 1
(c) greater than 1
(d) nothing can be said
Define Mechanical advantage
Can a simple machine act as a force multiplier and a speed multiplier at the same time?
Comment on the statement ‘The mechanical advantage of a machine is greater than 1’. Give an example of a lever mechanical advantage is:
(i) greater than 1.
(ii) Equal to 1.
Give an example of the following use of a machine to change the point of application of the force.
Give an example of the following use of a machine to change the direction of force.
Classify the following as a lever, a pulley and an inclined plane:
An axe
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
Which machine will you use to do the following work? Write their type.
To lift bricks to the top of a tall building.
