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प्रश्न
Is power a scalar quantity?
एका वाक्यात उत्तर
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उत्तर
Yes, power is a scalar quantity.
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संबंधित प्रश्न
Work done = Force × ........................................
Define work.
State two conditions when no work is done by a force.
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
A box of weight 150 kgf has gravitational potential energy stored in it equal to 14700 J. Find the height of the box above the ground. (Take g = 9.8 N kg-1)
Define potential energy.
What is the P.E. of a body lying on the surface of the earth?
In what form is energy stored in a wrist watch?
What is work?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A green plant is carrying out photosynthesis.
