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प्रश्न
For the following scenario, state whether the work done by gravity is positive, negative, or zero.
A person walks on a levelled road.
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उत्तर
Zero work is done.
Explanation:
When a person walks on a levelled, no work is done against the force of gravity, as the displacement of the person is normal to the direction of the force of gravity, which is vertically downwards.
संबंधित प्रश्न
When does a force do work?
State the condition when the work done by a force is positive. Explain with the help of examples.
Is it possible that no transfer of energy may take place even when a force is applied to a body?
What do you mean by equilibrium of a body?
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.
Give the units of couple.
State two conditions for work to be done.
What is the S.I. unit of work? Define it.
State the C.G.S. unit of work. How it is related to its S.I. unit?
