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प्रश्न
The S.I. unit of energy is .............
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उत्तर
The S.I. unit of energy is joule.
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संबंधित प्रश्न
Work is said to be done by a forte only when ................
A force of 30 N acts on a body and moves it through a distance of 5 m in the direction of force. Calculate the work done by the force.
Fill in the blank with suitable word :
1 joule is the work done when a force of 1 __________ moves an object through a distance of one __________ in the direction of __________.
State the conditions of equilibrium for a rigid body.
Is work done a scalar or a vector physical quantity?
A machine raises a load of 750 N through a height of 16 m in 5s. calculate:
(i) work done by machine,
(ii) power at which the machine works.
Give an example
Light energy changes to electrical energy.
Is power a scalar or a vector quantity?
What should be the characteristic of a source of energy?
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
