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प्रश्न
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उत्तर
When the head of a nail is struck with a hammer, the mechanical energy of the hammer pushes the nail into the plank of wood and in this process a part of energy is converted into heat energy.
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संबंधित प्रश्न
A certain form of energy which is not sourced directly or indirectly from the sun and does not cause any pollution is very easily converted into electricity. This form of energy is, however, not available everywhere. Moreover, it is technically very difficult and expensive to obtain it. Name the form of energy.
A cyclist doubles his speed. How will his kinetic energy change: increase, decrease or remain same ?
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
Give one example to show that the sum of potential energy and kinetic energy remains constant if friction is ignored.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
A stretched wire
Select the renewable and non-renewable sources of energy from the following:
Oil
State the energy changes which take place when:
A body thrown vertically upwards from the ground.
State the energy changes which take place when:
Photographic film is exposed to sunlight.
Calculate the kinetic energy of a body of mass 0.1 kg. and momentum 40kg m/s.
What is the difference between the solid, liquid, and gaseous states of a substance?
