What is the work done by force of gravity in the following case? (2)
(a) Satellite moving around the earth in a circular orbit of radius 35000 km.
(b) A stone of mass 250 g is thrown up through a height of 2.5 m.
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1. case of satellite: work done will be 0, as the displacement here is occuring in perpendicular direction to the force applied ie gravity.
2. case 2:here also as the stone comes back tpo the earth, the displacement is 0. so the net work done by gravitational force will be 0. in moving the stone up the workdone will be exactly the same and opposite while the stoneis coming down.
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Answer:
a) work done will be zero
b)net force is zero
Explanation:
a) displacement here is occurring in perpendicular to gravitational force
b) the stone comes back to the earth so displacement is 0 then net force is zero
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