Advertisements
Advertisements
Question
State the work energy theorem.
Advertisements
Solution
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
RELATED QUESTIONS
A light mass and a heavy mass have equal momentum. Which will have more kinetic energy?
(Hint : Kinetic energy K = P2/2m where P is the momentum.)
Name six different forms of energy?
State two uses of solar cells.
State two disadvantages of producing electricity from solar energy.
State two disadvantages of using nuclear energy for producing electricity.
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
For the same kinetic energy of a body, what should be the change in its velocity if its mass is increased nine times?
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
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
|
