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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
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
A bucket full of water .is on the first floor of your house and another identical bucket with same quantity of water is kept on the second floor. Which of the two has greater potential energy ?
Name the type of energy (kinetic or potential) possessed by the following:
A moving cricket ball.
Give one example to show the conversion of potential energy to kinetic energy when put in use.
What is solar energy?
State the energy changes which take place when:
Burning of coal.
Give one example when:
Kinetic energy changes to heat energy.
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
Two bodies, A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies.
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
