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प्रश्न
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a loaded truck when started and set in motion.
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उत्तर
The chemical energy of petrol or diesel is converted into mechanical energy (kinetic energy).
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संबंधित प्रश्न
State the energy changes in the following case while in use:
An electric iron
State the energy changes in the following while using an electric motor.
State the energy changes that occur in the following :
An electric generator (or dynamo).
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a car going uphill.
State the energy changes in the following case while in use:
a steam engine
State the energy changes in the following case while in use:
Microphone
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. What happens to the mechanical energy after the ball hits the ground and comes to rest?
Define watt. Express kilowatt in terms of joule per second. A 150 kg car engine develops 500 W for each kg. What force does it exert in moving the car at a speed of 20 ms–1?
State the energy changes in the following case while in use:
An electric cell in a circuit
In an electric cell while in use, the change in energy is from ______.
