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प्रश्न
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
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उत्तर
During the vertical fall of ball, if friction due to air is neglected, the total sum of potential energy and kinetic energy at each point of its path remains same.
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संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
A stone at rest on the top of a building.
State the changes in form of energy while producing hydro electricity.
Renewable source of energy is:
Name the form of energy in which potential energy can change.
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
Give one example when:
Mechanical energy to heat energy.
Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
What is meant by energy?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving cricket ball
