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प्रश्न
State the energy transformation on the following:
Electricity is obtained from solar energy.
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उत्तर
Light energy into electrical energy
संबंधित प्रश्न
A boy of weight 40 kgf climbs up the 15 steps, each 15 cm high in 10 s and a girl of weight 20 kgf does the same in 5 s. Compare:
- the work done, and
- the power developed by them. Take g = 10 N kg-1.
How much work is done when a body of mass m is raised to a height h above the ground?
What is the condition for a force to do work on a body?
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Is work done a scalar or a vector physical quantity?
Fill in the boxe to show the corresponding energy transformation.
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A donkey is carrying a load on its back.
Work done by this force at any instant is ______.
