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प्रश्न
How is kinetic energy possessed by a moving body measured?
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उत्तर
The kinetic energy possessed by a moving body is measured by the amount of work done by an opposing force in bringing the body to rest from its present state of motion.
संबंधित प्रश्न
(i) The conversion of part of the energy into an undesirable form is called ______________.
(ii) For a given height h, __________________ the length l of the inclined plane, lesser will be the effort required.
Give one example of a body that has potential energy, due to its position at a height.
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the ground.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
A stretched wire
State different forms of potential energy and give one example of each.
How much hydroelectric power is generated in India?
MULTIPLE CHOICE TYPE:
The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun
What is the main energy transformation that occur in:
Photosynthesis in green leaves.
State two advantages and two disadvantages of using hydro-energy for producing electricity.
State the energy changes which take place when:
Photographic film is exposed to sunlight.
