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प्रश्न
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उत्तर
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संबंधित प्रश्न
Derive a relationship between S.I. and C.C.S. unit of work
Express joule in terms of erg.
State two disadvantages of producing hydroelectricity.
Write the formula for work done on a body when the body moves at an angle to the direction of force. Give the meaning of each symbol used.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a) Calculate the work done by the force in moving the block from A and B.
(b) Calculate the potential energy gained by the block.
Write the two main conditions are needed for work to be done?
