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प्रश्न
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
पर्याय
Yes
No
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उत्तर
No
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संबंधित प्रश्न
A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see the given figure). Let us take it that the force acts on the object through the displacement. What is the work done in this case?
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
Is work a scalar or a vector quantity?
A force of 50 N acts on a body and moves it a distance of 4 m on horizontal surface. Calculate the work done if the direction of force is at an angle of 60° to the horizontal surface.
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
