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प्रश्न
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उत्तर
Work done depends upon:
(i) the magnitude and direction of the applied force, and
(ii) the displacement it produces.
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संबंधित प्रश्न
When do we say that work is done?
The S.I. unit of energy is .............
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
In case of negative work, the angle between the force and displacement is :
A girl weighing 400 N climbs a vertical ladder. If the value of g be 10 m s−2, the work by her after climbing 2 m will be :
P, Q and R are three forces which act as shown in fig.
The point O lies in the same plane. Given, P = Q = R = 10N
(i) Which force has the least moment about O? Give a reason.
(ii)Which force has the greatest moment about O? Give a reason.
Name the physical quantity whose MKS units are kgm2s-3.
Fill in the boxe to show the corresponding energy transformation.
