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प्रश्न
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उत्तर
The parameters that can change the kinetic energy are:
(i) Mass
(ii) Speed
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संबंधित प्रश्न
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 vessel containing 50 kg of water is placed at a height 15 m above the ground. Assuming the gravitational potential energy at ground to be zero, what will be the gravitational potential energy of water in the vessel? (g = 10 m s-2)
What are the units of (a) work, and (b) energy?
Is the motion of moon around the earth in circular path an accelerated motion?
Complete the following sentences:
The SI unit of work is ....... and of power is .......
In the following case write yes, if the work is being done and no if no work is being done.
A coolie standing with a heavy load on his head
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one
One labourer carried four pans of road metal through a distance of 100 metres. If he carries two pans of road metal through a 200 metre distance ______ work will be done.
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A wind-mill is lifting water from a well.
