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प्रश्न
The work done on an object does not depend upon the
पर्याय
displacement
force applied
the angle between force and displacement
the initial velocity of the object
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उत्तर
initial velocity of the object
Explanation:
The work done on an object does not depend upon the initial velocity of the object.
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संबंधित प्रश्न
Write true or false of the following statement.
One form of energy cannot be converted into another form.
What is potential energy ? State its unit.
Give a reason for the following.
The efficiency of a machine is always less than 100%.
How many joules are there in one kilowatt-hour?
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule).
- Take two aluminium channels of different lengths.
- Place the lower ends of the channels on the floor and hold their upper ends at the same height.
- Now take two balls of the same size and weight and release them from the top end of the channels. They will roll down and cover the same distance.
- At the moment of releasing the balls, which energy do the balls have?
- As the balls roll down which energy is converted into which other form of energy?
- Why do the balls cover the same distance on rolling down?
Note: The question is wrong. It should be "Why do the balls cover the same distance after rolling down"? - What is the form of the eventual total energy of the balls?
- Which law related to energy does the above activity demonstrate? Explain.
Can you tell?
When can we say that displacement has taken place?
Which one of the following requires wind energy?
Find out the form of energy possessed by the following thing.
A rock on the top of a hill
