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The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is

(a) mgR/2

(b) 2mgR

(c) mgR

(d) mgR/4
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1 Answer

 
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Ve=\(\sqrt{2gR}\)      _______ Formula of Escape velocity

\(\)... Kinetic Energy =

\({{1\over2}mv_e^2= {1\over2}m\times2gR }\)

\(mgR\)

option C is correct
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