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प्रश्न
Name the quality which is measured in Wh.
उत्तर
Energy is measured in Wh
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संबंधित प्रश्न
A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions
1) Is the stone moving with a uniform or variable speed?
2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?
3) What kind of force acts on the hand and state its direction?
When a body moves in a circular path, how much work is done by the body? Give reason.
(Hint: The body is acted upon by the centripetal force.)
State two factors on which power spent by a source depends. Explain your answer with examples.
A body of mass m is moving with a uniform velocity u. A force is applied on the body due to which its velocity changes from u to v. How much work is being done by the force?
The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.
Define one newton. Write the relation between the S. I. unit and the C.G.S. unit of force.
State the condition when the work done by the force is positive
State the condition when the work done by the force is negative.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
