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प्रश्न
Work done by this force at any instant is ______.
उत्तर
Work done by this force at any instant is zero.
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संबंधित प्रश्न
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Power spent by a body depends on the time for which it does work.
A boy throws a rubber ball vertically upwards. What type of work, positive or negative, is done : by the force applied by the boy?
(a) by the force applied by the boy?
(b) by the gravitational force of earth?
Why is the work done on an object moving with uniform circular motion zero?
Fill in the boxe to show the corresponding energy transformation.
State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.
How is horse power related to the S. I. unit of power?
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
A is a push or a pull ______.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Suma is swimming in a pond.
A force of F = (5y + 20) `hat"j"` N acts on a particle. The work done by this force when the particle is moved from y = 0 m to y = 10 m is ______ J.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
