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प्रश्न
Give an example
Chemical energy changes to heat energy.
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उत्तर
Candle flame
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संबंधित प्रश्न
State two conditions when no work is done by a force.
When is work said to be done by a force?
State two advantage of producing hydroelectricity.
Fill in the blank with suitable word :
Work is measured as a product of __________ and __________
Is it possible that a force is acting on a body but still the work done is zero? Explain giving one example.
The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.
Its moment of a force scalar or a vector quantity?
Name the force acting away from the centre of circular path.
Name the physical quantity associated with the 'rate of doing work'.
A coolie, with a load of 30 kg on his head, walks on the platform. If he walks a distance of 60 m, what is the work done by him?
