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

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

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Applied Mechanics and Graphic Statics
Newton's law of Collision of elastic bodies states that when two moving bodies collide each other, their velocity of separation

Bears a constant ratio to their velocity of approach
Is directly proportional to their velocity of approach
Is equal to the sum of their velocities of approach
Is inversely proportional to their velocity of approach

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