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प्रश्न
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.
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उत्तर
- Wind energy applies a force on the sailboat to push it in the forward direction.
- Therefore, there is a displacement in the boat in the direction of force.
- Hence, work is done by wind on the boat.
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संबंधित प्रश्न
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The loss in potential energy of the body,
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
The work done on an object does not depend on the :
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
Fill in the boxe to show the corresponding energy transformation.
State the energy changes which take place when A toy car with a wound spring moves on ground.
A ______ should act on an object.
