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प्रश्न
state the unit of energy.
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उत्तर
The SI unit of work is ‘joules’ and the CGS unit is ‘erg’.
संबंधित प्रश्न
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
Work done by a boy depends on the time in which he does work.
When does a force perform work?
State the energy transformation on the following:
Electricity is obtained from solar energy.
What should be the angle between the direction of force and the direction of motion of a body so that the work done is zero?
Fill in the boxe to show the corresponding energy transformation.
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
Mention whether work is done or not in the following activity.
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | |
| 2. | Holding a doll | |
| 3. | Sitting in a bus | |
| 4. | Pushing a wall | |
| 5. | Digging soil |
What is work?
