Please select a subject first
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Work done = Force × ........................................
Concept: undefined >> undefined
The energy of a body is its capacity to do .........
Concept: undefined >> undefined
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The S.I. unit of energy is .............
Concept: undefined >> undefined
Light travels at a lower speed in water than in air.
Concept: undefined >> undefined
Image is formed by a mirror due to refraction of light.
Concept: undefined >> undefined
No work is done by a force if the body
Concept: undefined >> undefined
State two conditions when no work is done by a force.
Concept: undefined >> undefined
In which of the following cases is work being done:
- A boy pushing a heavy rock
- A boy climbing up the stairs
- A coolie standing with a box on his head
- A girl moving on the road.
Concept: undefined >> undefined
A coolie is moving on a road with a luggage on his head. Does he perform work against the force of gravity? Give reason for your answer.
Concept: undefined >> undefined
The moon is revolving around the earth in a circular path. How much work is done by the moon?
Concept: undefined >> undefined
Write the expression for work done by a force.
Concept: undefined >> undefined
Water is optically .......... than air.
Concept: undefined >> undefined
Air is optically .......... than glass.
Concept: undefined >> undefined
State the S.I. unit of work and define it.
Concept: undefined >> undefined
When a ray of light travels from water to air, it bends ............. the normal.
Concept: undefined >> undefined
State two factors on which the work done on a body depends.
Concept: undefined >> undefined
When a ray of light travels from air to glass, it bends .......... the normal.
Concept: undefined >> undefined
