Questions
A satellite is revolving around the earth in a circular orbit whose radius is R; work done by gravitational force in one revolution is :
a
zero
b
2mgR2
c
mgR2
d
mgR
detailed solution
Correct option is A
Since gravitational force is a conservative force, work done by the force in one complete revolution is zero.Alternatively we can say that gravitational force of attraction on the satellite is always perpendicular to its velocity, as a result power delivered to the satellite is always zero .Talk to our academic expert!
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