Cueball moon (a featureless globe with no atmosphere, but the same mass and radius as our moon) has a mass of 7.4 X 10^(22) kg and a radius of 1.7 X 10^(6) m.
The appropriate tangential speed (in km/s) for a 10,000-kg spacecraft to achieve a circular orbit just above the surface is .

50 inches should be the resultant vector

b.a device that inputs heat into a cool object

your answer is, orbit around the nucleus

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.