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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
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.
A uniform circular motion is an accelerated motion. Justify it.
Does the earth move around the sun with a uniform velocity?
Name the physical quantity whose MKS units are kgm2s-3.
A body does 20 J of work in 10 s. What is its power?
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
