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प्रश्न
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
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उत्तर
Force due to gravity on the body F = mg
Work done in lifting the body against the force of gravity to a height h above the ground
W = F × d = mg × h = mgh
Thus, the potential energy of the body = mgh.
संबंधित प्रश्न
A body of mass m falls down through a height h. Obtain an expression for the work done by the force of gravity.
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A moving cricket ball
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Name three non-renewable sources of energy.
Give three examples of bodies possessing kinetic energy.
Give three examples of bodies possessing potential energy.
What is the main energy transformation that occur in:
Charging of a battery.
Name the two groups in which various sources of energy are classified?
Name a device in which solar energy is converted into electricity state its two uses.
Give one example when:
Mechanical energy changes to electric energy.
