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Applied Mechanics - Engineering

Q1:

The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface

A uneven distribution of the gravitational field

B gravity of the sun and the moon

C aerodynamic forces

D none of these.

ANS:D - none of these.

The gravitational field is even over the earth atmosphere and also earth's gravitational pull plays a major role rather than that of sun and moon.

It all depend on upon the escape velocity and the velocity at which satellite is placed into the orbit.

You can also refer here:-

http://en.wikipedia.org/wiki/satellite