Advertisements
Advertisements
प्रश्न
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Advertisements
उत्तर
The energy of a body in motion is called it's kinetic energy. It is defined as follows :
Kinetic energy of a body is the energy possessed by it due to its state of motion.
Actually, it is the work done on the body bringing it to the state of motion. In short form it is written as K.E. or K.
Example: In a swinging pendulum moving to and fro, the bob has the kinetic energy.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
The energy possessed by a body due to its position is called ________ energy.
What is ocean? Explain in brief.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Name the energy changes for the following:
bicycle brakes
Write the type of energy possessed in the following case:
A falling apple
State two advantages and two disadvantages of using hydro-energy for producing electricity.
Give one example when:
Sound energy changes to electric 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
|
What are the small particles that can be seen in a beam of light that enters a dark room?
