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प्रश्न
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उत्तर
1 H.P. = 0.746 kW
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संबंधित प्रश्न
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.
Complete the following sentences:
Joule is the unit of .......
Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction
State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
Who is the odd one out?
