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प्रश्न
State whether the following statement is True or False.
A machine performs work by itself.
पर्याय
True
False
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उत्तर
False
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संबंधित प्रश्न
What is an ideal machine?
Why is a machine not 100% efficient?
Define Mechanical advantage
What is the efficiency of an ideal machine?
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.
A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
Classify the following as a lever, a pulley and an inclined plane:
A slide
Classify the following as a lever, a pulley and an inclined plane:
An opener
Classify the following as a lever, a pulley and an inclined plane:
A crane
______ help us to make work easier.
