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.
APPEARS IN
संबंधित प्रश्न
What is geothermal energy?
State the energy change in the following device while in use:
A loudspeaker
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
Select the renewable and non-renewable sources of energy from the following:
Oil
State two disadvantages of using nuclear energy for producing electricity.
Name the energy changes for the following:
electric ball
Two bodies A and B of masses m and M (M ≫ m) have same kinetic energy. Which body will have more momentum?
What kind of energy is possessed in a situation when?
A horse running along a level road
Give one example when:
Kinetic energy to potential energy.
