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प्रश्न
Fill in the boxe to show the corresponding energy transformation.
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उत्तर
Chemical energy ⇌ Light energy
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संबंधित प्रश्न
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?
Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s-1.
A person of mass 50 kg climbs a tower of height 72 metres. Calculate the work done. (g = 9.8 m s−2).
Each of the following statement describes a force acting. Which force is causing work to be done?
A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a) Calculate the work done by the force in moving the block from A and B.
(b) Calculate the potential energy gained by the block.
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
