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प्रश्न
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
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उत्तर
The kinetic energy changes to potential energy when stone rises up. The potential energy then changes back to kinetic energy, when stone comes down.
संबंधित प्रश्न
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
An arrow shot out of a bow.
What is ocean? Explain in brief.
State two advantages of using wind energy for generating electricity.
State two disadvantages of using wind energy for generating electricity.
Name two examples in which the mechanical energy of a system remains constant.
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
Is it possible that a body may possess energy even when it is not in motion?
What is dissipation of energy?
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
Use your brain power!
How do we save fuel by using public transport?
