Advertisements
Advertisements
प्रश्न
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
Advertisements
उत्तर
Initial potential energy = mgh
Final potential energy = mg × 2h = 2mgh
Increase in potential energy = Final potential energy – Initial potential energy
= 2mgh – mgh = mgh.
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
A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.
Fill in the blank
The energy possessed by a body due to its motion is called ______ energy.
Name the type of energy (kinetic or potential) possessed by the following:
A stone at rest on the top of a building.
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
State two advantages of using wind energy for generating electricity.
What kind of energy is possessed in a situation when?
A horse running along a level road
State the energy changes which take place when:
During electrolysis.
Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.
The major problem in harnessing nuclear energy is how to
