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प्रश्न
State the law of conservation of energy.
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उत्तर
According to the law of conservation of energy, energy can neither be created nor can it be destroyed. It only changes from one form to another.
संबंधित प्रश्न
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B does the same in 15 s. Compare the work done.
What are the quantities on which the amount of work done depends? How are they related to work?
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?
Nm is the unit of .......
When you move upstairs, do you perform some work?
Work done by this force at any instant is ______.
