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प्रश्न
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उत्तर
When a body moves along a circular path, work done by the gravitational force towards the centre of the path is zero, because the displacement in this case is normal to the gravitational force.
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संबंधित प्रश्न
Explain degradation of energy by taking two examples of your daily life.
In case of negative work, the angle between the force and displacement is :
Complete the following sentences:
1 H.P. = ........ W.
Can two agents, doing the same work, have different power?
Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?
What do you understand by the term energy? Is energy a scalar or vector? How is the energy possessed by a body measured?
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
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.
