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प्रश्न
State the energy changes which take place when:
An air gun is loaded and then fired.
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उत्तर
During loading, the mechanical energy changes to the potential energy of spring. On firing, the potential energy of spring changes to the kinetic energy of the bullet.
संबंधित प्रश्न
State one important advantage and disadvantage each of using nuclear energy for producing electricity.
Name the type of energy (kinetic or potential) possessed by the following:
Water flowing in a river.
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
State the work energy theorem.
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Write the type of energy possessed in the following case:
A falling apple
Give two examples each of renewable and non-renewable sources of energy?
Give one example when:
Mechanical energy to heat energy.
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
What is meant by energy?
