Find the escape velocity of a body from the earth.
[M (earth ) = ` 6 xx 10^(24) ` kg, R ( earth) = ` 6.4 xx 10^(6) ` m.
G = ` 6.67 xx 10^(-11) N.m^(2)//kg^(2)]`

Explanation

Data : M = ` 6 xx 10^(24) kg, R= 6.4 xx 10^(6)` m
G= ` 6.67 xx 10^(-11) N.m^(2) //kg^(2)`
The escape velocity of a body from the earth.
`v_(ese) = sqrt((2GM)/R) = sqrt((2xx 6.67 xx 10^(-11)N.m^(2)//kg^(2) xx 6xx10^(24)kg)/(6.4 xx 10^(6) m))`
` sqrt((12xx 6.67 xx 10^(8))/64) = 1.118 xx 10^(4) m//s = 11.18 km//s.`