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प्रश्न
उत्तर
Work done depends upon:
(i) the magnitude and direction of the applied force, and
(ii) the displacement it produces.
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संबंधित प्रश्न
A coolie does no work against the force of gravity while carrying a luggage on a road.
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
When is work said to be done by a force?
Choose one or more correct alternatives.
For work to be performed, energy must be ______.
- transferred from one place to another
- concentrated
- transformed from one type to another
- destroyed
On what factors does the work done by a force depend?
Define energy and state the unit of energy and the law of conservation of energy.
A bullet is of mass 'm' g and is moving with a velocity 'v' m/s. Find the kinetic energy of the bullet when
(a) The mass is doubled,
(b) The velocity is tripled.
Fill in the boxe to show the corresponding energy transformation.
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
State larger units of power.
Explain, why submarines are able to dive underwater as well as a sail on the surface of the water?
What are the advantages and disadvantages of using solar cells for producing electricity?
Who is the odd one out?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
An engine is pulling a train.
A proton is kept at rest. A positively charged particle is released from rest at a distance d in its field. Consider two experiments; one in which the charged particle is also a proton and in another, a positron. In the same time t, the work done on the two moving charged particles is ______.
