Advertisements
Advertisements
प्रश्न
What is the difference between potential energy and kinetic energy?
State two differences between potential energy and kinetic energy.
Advertisements
उत्तर
| Potential Energy | Kinetic Energy |
| It is the energy of a body by virtue of its change in shape, size or configuration. | It is the energy of a body by virtue of its motion. |
| It is independent on the speed of the body. | It is directly proportional to the square of the speed of the moving body. |
संबंधित प्रश्न
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
State whether the object possess kinetic energy, potential energy, or both :
A bird running on the ground ____________.
What kind of energy is possessed by the following?
A compressed spring ____________.
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Define the term 'energy' of a body. What is the SI unit of energy.
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
Water stored in a dam possesses ______.
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Electrical energy into sound energy.
Name the device or machine which convert :
Heat energy into kinetic energy (or mechanical energy).
What kind of energy transformation take place at a hydroelectric power station?
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
How much electrical energy in joules does a 100 watt lamp consume : in 1 minute?
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
Describe the energy changes which take place in a radio.
Name the energy transfers which occur when someone speaks into a microphone.
When an object falls freely towards the earth, then its total energy :
Which of the following energy change involves frictional force?
In the case of negative work, the angle between the force and displacement is
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
