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प्रश्न
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
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उत्तर
(i) Potential energy
(ii) Heat energy
(iii) Potential energy
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संबंधित प्रश्न
An electron emitter must have _____________ work function and ___________ melting point.
State the energy transformation on the following:
Electricity is obtained from solar energy.
Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force. How much was the work done by Ravi?
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
A boy pulls a box up to 10 m with a force of 5 kgf. Calculate the work done by him.
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.
Give an example
Chemical energy changes to electrical energy.
