Posted by **Gerry** on Wednesday, April 27, 2011 at 12:36pm.

find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is negelcted.

The gravitational constant is given as G= 6.67428*10^-11 m^3 kg^-1 s^-2

Please give lots of details in answer

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