In the Previous Problem, If $y ( 0 ) = R$

Multiple Choice

In the previous problem, if $y ( 0 ) = R$ , the escape velocity is

A) $v _ { 0 } = 2 k / ( m R )$
B) $v _ { 0 } = 2 R / ( m k )$
C) $v _ { 0 } = 2 m / ( k R )$
D) $v _ { 0 } = \sqrt { 2 m / ( k R ) }$
E) none of the above