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प्रश्न
Complete the following sentences:
The SI unit of work is ....... and of power is .......
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उत्तर
The SI unit of work is joule and of power is watt
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संबंधित प्रश्न
Derive a relationship between S.I. and C.C.S. unit of work
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
Give two examples of couple actions in our daily life.
Does the earth move around the sun with a uniform velocity?
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.
