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प्रश्न
A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
उत्तर
Kinetic energy changes into potential energy.
संबंधित प्रश्न
Geothermal energy is produced by the:
(a) fission of radioactive materials
(b) burning of coal inside the coal mines
(c) combustion of natural gas deep inside the earth
(d) fusion of radioactive substances
What is meant by the renewable and non-renewable sources of energy? Distinguish between them giving two examples of weach.
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Name the form of energy in which potential energy can change.
State two advantages and disadvantages of using nuclear energy for producing electricity.
State the energy changes which take place when:
A body thrown vertically upwards from the ground.
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
What is the form of that graph between
(i) K.E. and velocity for a constant mass?
(ii) K.E. and mass for a constant velocity?
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
