The escape velocity of projectile on the surface of earth is 11.2 Kms^(-1). If a body is projected out with thrice of this speed, find the speed of the body far away from the earth. Ignore the presence of other planets and sun.

The escape velocity of projectile on the surface of earth is 11.2 Kms^

1.	The escape velocity of projectile on the surface of earth is 11.2 Kms^(-1). If a body is projected out with thrice of this speed, find the speed of the body far away from the earth. Ignore the presence of other planets and sun.
Answer» Solution :`V = sqrt(v_(p)^(2) - v_(e)^(2)) = sqrt((3V_(e))^(2) - v_(G)^(2))` `= sqrt(8 XX 11.2) = 31.68 kms^(-1)`.