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प्रश्न
Nm is the unit of .......
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उत्तर
Work
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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?
How much energy is gained by a box of mass 20 kg when a man, carrying the box waits for 5 minutes for a bus?
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
Each of the following statement describes a force acting. Which force is causing work to be done?
A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?
Can every force produce work?
A girl of mass 50 kg runs up a flight of 40 steps in 20 seconds. If each step in 20 cm high, calculate the power developed by the girl. (g= 10 ms-2).
Give an example
Electrical energy changes to heat energy.
In the following case write yes, if the work is being done and no if no work is being done.
A boy climbing up a staircase.
Is power a scalar or a vector quantity?
