Physics
Grade-10
Easy
Question
The radius of the orbit is r, for a satellite of mass m, which is moving around a planet of mass M, then the orbital velocity of the satellite is given by:
Hint:
On a body in circular motion, gravitational force of attraction and centripetal forces act.
The correct answer is:
Mass of planet = M
Mass of satellite = m
Radius of orbit = r
Let, v be the velocity of the satellite. For the satellite to be able to revolve in the orbit, the centripetal force must be balanced by gravitational force
Fc = Fg
=
After solving, we get:
v2 = 
Let, v be the velocity of the satellite. For the satellite to be able to revolve in the orbit, the centripetal force must be balanced by gravitational force
Fc = Fg
=After solving, we get:
v2 =
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