question_answer

The least velocity required to throw a body away from the surface of a planet so that it may not return is (radius of the planet is \[6.4\times {{10}^{6}}m,\,\,g=9.8\,m/se{{c}^{2}})\]           [AMU (Engg.) 1999]

A)             \[9.8\times {{10}^{-3}}m/sec\]

B)               \[12.8\times {{10}^{3}}m/sec\]

C)             \[9.8\times {{10}^{3}}m/sec\]

D)               \[11.2\times {{10}^{3}}m/sec\]