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प्रश्न
What do you understand by the kinetic energy of a body?
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उत्तर
A body in motion is said to possess the kinetic energy. The energy possessed by a body by virtue of its state of motion is called the kinetic energy.
संबंधित प्रश्न
Fill in the blank
Energy possessed by a compressed spring is ______ energy.
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A piece of stone placed on the roof.
What is solar energy?
State two disadvantages of producing electricity from solar energy.
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.
State the energy changes which take place when:
In a heat engine.
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.
In a hydroelectric power station, 1000 kg of water is allowed to drop through a height of 100 m in 1 sec. If the conversion of potential energy to electric energy is 60%. Calculate the power output. [Take: g = 10m/sec2]
What are the small particles that can be seen in a beam of light that enters a dark room?
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A compressed spring
