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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
State the S.I. unit of work and define it.
How much work is done when a body of mass m is raised to a height h above the ground?
A woman pulls a bucket of water of total mass 5 kg from a well which is 10 s. calculate the power used by her.
What do you understand by ‘potential energy’? Give three examples to illustrate your answer.
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
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Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
Food grains are getting dried in the sun.
State whether work is done or not, by writing yes or no, in the following case:
A man pushes a wall.
