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प्रश्न
Give an example
Electrical energy changes of sound energy.
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उत्तर
Electric bell
संबंधित प्रश्न
Work done = Force × ........................................
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
The velocity of a car increases from 54 km/hr to 72 km/hr. How much is the work done if the mass of the car is 1500 kg?
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 energy changes which take place when A toy car with a wound spring moves on ground.
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
A ______ should act on an object.
