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प्रश्न
In the following case write yes, if the work is being done and no if no work is being done.
A man trying to push a wall.
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उत्तर
No.
संबंधित प्रश्न
A stone of mass m is rotated in a circular path with a uniform speed by tying a strong string with the help of your hand. Answer the following questions
1) Is the stone moving with a uniform or variable speed?
2) Is the stone moving with a uniform acceleration? In which direction does the acceleration act?
3) What kind of force acts on the hand and state its direction?
Differentiate between work and power.
kWh is the unit of ______.
Name the quality which is measured in Wh.
What do you understand by the clockwise and anti clockwise moment of force?
What do you mean by uniform circular motion?
An engine does 54,000 J of work by exerting a force of 6000 N on it. What is the displacement in the direction of the force?
State the S.I. and C.G.S. units of energy. How are they related?
Derive a relation between the S.I. and C.G.S. unit of force.
A boy weighing 50 kgf climbs up from the first floor at a height of 3 m above the ground to the third floor at a height of 9 m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg-1).
