Advertisements
Advertisements
प्रश्न
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
Advertisements
उत्तर
Kinetic energy changes into potential energy.
संबंधित प्रश्न
Give one example of a body that has potential energy, due to its position at a height.
Name five renewable sources of energy.
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
Two bodies A and B of masses m and M (M ≫ m) have same kinetic energy. Which body will have more momentum?
State two advantages and disadvantages of using nuclear energy for producing electricity.
State the energy changes which take place when:
Photographic film is exposed to sunlight.
Give one example when:
Light energy changes to chemical energy.
Show that in case of a body falling freely under gravity, total mechanical energy remains conserved (neglect air resistance).
What ts the original source of energy for the electricity produced at a thermal power station?
