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प्रश्न
Give one example of a body that has potential energy, in due to its state.
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उत्तर
A wound-up watch spring holds potential energy since its coils are wound up.
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संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
A compressed spring.
State two characteristic which a source of energy must have.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s−2).
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
What kind of energy is possessed in a situation when?
A shooting arrow.
Write the type of energy possessed in the following case:
A falling apple
State the energy changes which take place when:
A car moves up a hill.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
State the energy changes which take place when:
During electrolysis.
Give one example when:
Electric energy changes to mechanical energy.
