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प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
A stone at rest on the top of a building.
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उत्तर
Potential energy.
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संबंधित प्रश्न
State the energy changes in the following case while in use:
an electric bulb
Name five renewable sources of energy.
State four ways for the judicious use of energy.
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
What do you understand by mechanical energy?
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
State the energy changes which take place when:
Burning of coal.
A moving body weighing 400 N possesses 500 J of kinetic energy. Calculate the velocity with which the body is moving. (g = 10 ms2)
In which states is water found in nature?
