Advertisements
Advertisements
प्रश्न
State the work energy theorem.
उत्तर
When a moving body experiences force applied to it in the direction of that force.
- Work is done.
- K.E. rises in a manner that is proportional to the force's work. The term "work energy theory" refers to this.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
State the energy changes which take place when:
A car moves up a hill.
State the energy changes which take place when:
Food is digested by animals.
A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms-2]
You might have seen some beautiful fireworks during Diwali. It is an example of the transformation of ______ energy into ______ energy.
Match the pairs.
| Group 'A' | Group 'B' | ||
| (1) | Rolling object | (a) | Heat energy |
| (2) | Food | (b) | Atomic energy |
| (3) | Stretched bow | (c) | Kinetic energy |
| (4) | Sunlight | (d) | Potential energy |
| (5) | Uranium |
(e)
|
Chemical energy
|
When and why do clothes smell of naphthalene?
