Applied Mechanics and Graphic Statics
The gravitational force makes a satellite go round the earth in a circular orbit, if it is projected with an initial velocity of

11.11 km/sec at a height of 37,400 km
8.04 km/sec at a height of 285 km
11.26 km/sec, the satellite escapes the pull of the earth
All listed here

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Applied Mechanics and Graphic Statics
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

Arithmetical sum of the resolved parts of the forces in the direction
Difference of the forces multiplied by cosine θ°
Algebraic sum of the resolved parts of the forces in the direction
Sum of the forces multiplied by the tangent θ°

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