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प्रश्न
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उत्तर
Work
APPEARS IN
संबंधित प्रश्न
Work done by a boy depends on the time in which he does work.
The S.I. unit of work is
State two conditions when no work is done by a force.
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force. How much was the work done by Ravi?
A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?
Give an example
Electrical energy changes to heat energy.
How is horse power related to the S. I. unit of power?
A coolie is pushing a box weighing 1500 N up an inclined plane 7.5 m long on to a platform, 2.5 m above the ground.
(i) Calculate the mechanical advantage of the inclined plane. (ii) Calculate the effort applied by the coolie.
(iii) In actual practice, the coolie needs to apply more effort than what is calculated. Give one reason why you think the coolie needs to apply more effort.
