Advertisements
Advertisements
प्रश्न
A coolie does no work against the force of gravity while carrying a luggage on a road.
विकल्प
True
False
Advertisements
उत्तर
True.
APPEARS IN
संबंधित प्रश्न
When do we say that work is done?
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.
State the S.I. unit of energy.
How is work related to energy?
Is the motion of moon around the earth in circular path an accelerated motion?
Name the force acting away from the centre of circular path.
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
Give an example
Light energy changes to electrical energy.
Name two places in India where electricity is generated from nuclear power plants.
