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प्रश्न
Differentiate between the potential energy (U) and the kinetic energy (K).
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उत्तर
| Potential energy (U) | Kinetic energy (K) |
| 1. The energy possessed by a body by virtue of its specific position or changed configuration is called potential energy. | 1. The energy possessed by a body by virtue of its state of motion is called kinetic energy. |
| 2. Two forms of potential energy are gravitational potential energy and elastic potential energy. | 2. Forms of kinetic energy are translational, rotational and vibrational kinetic energy. |
| 3. Example: A wound up watch spring has potential energy. | 3. Example: a moving car has kinetic energy. |
संबंधित प्रश्न
Fill in the blank
The energy possessed by a body due to its position is called ________ energy.
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
Give one relevant example for the following transformation of energy :
Electrical energy to light energy.
State the energy changes in the following case while in use:
a ceiling fan
Why using wood as fuel is not advisable although wood is a renewable source of energy?
State the energy transformation on the following:
Electricity is obtained from nuclear energy.
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).
Write the type of energy possessed in the following case:
A wound-up spring
State two advantages and two disadvantages of using hydro-energy for producing electricity.
State the energy changes which take place when:
In a heat engine.
