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प्रश्न
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उत्तर
The work done by the gravitational force of the earth on a satellite revolving around the earth is zero because the motion of the satellite is perpendicular to the force at every point.
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संबंधित प्रश्न
Work done = Force × ........................................
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
Fill in the blank with suitable word :
The work done on a body moving in a circular path is __________
What is the SI unit of work?
The work done by the heart is 1 Joule per beat. Calculate the power of the heart if it beats 72 times in one.
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.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
