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Work, Energy and Power
Question
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Answer carefully, with reasons:

Is the total linear momentum conserved during the short time of an elastic collision of two balls?

Answer

Yes, because during the collision there is no external force on the colliding bodies. Hence, according to the law of conservation of linear momentum, the total linear momentum of the system will remain conserved.

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Some More Questions From Work, Energy and Power Chapter

Define the unit joule.

What are different units of energy?

What is watt?

Define watt.

How many joules are there in one eV?

What is the relation between kWh and Joule?

Does the body at rest possess energy?

By eating two apples, a person starts pushing the wall of room. If food value of apple is 100 calories per apple, how much work he will do in pushing the wall in one hour?