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प्रश्न
Give an example
Electrical energy changes of sound energy.
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उत्तर
Electric bell
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संबंधित प्रश्न
The S.I. unit of energy is .............
A machine raises a load of 750 N through a height of 16 m in 5 s. calculate:
- energy spent by machine,
- power at which the machine works.
What happens to the work done when the dispacement of body is at right angles to the direction of force acting on it? Explain your answer.
Choose one or more correct alternatives.
Joule is the unit of ______.
- force
- work
- power
- energy
What is meant by a translational motion? Give one example.
Does the earth move around the sun with a uniform velocity?
A block of mass 30 kg is pulled up a slope, as shown in diagram with a constant speed, by applying a force of 200 N parallel to slope.
A and B are initial and final positions of block.
(i) Calculate the work done by force in moving the block from A to B.
(ii) Calculate P.E. gained by block. [g=10ms-2]
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
