v24

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Verified by Experts

The correct Answer is:
16
`KE_(i)+PE_(i)=KE_(f)+PE_(f)`
`implies1/2"mu"_(0)^()+(-(GMm)/(10R))=1/2mv^(2)`
`+(-(GMm)/R)`
`impliesv^(2)=u_(0)^(2)+(2GM)/R[1-1/10]` `impliesv=sqrt(u_(0)^(2)+9/6(GM)/R)`
`=sqrt(12^(2)+(9/5)((11.2)^(2))/2)`
`=sqrt(144+0.9(11.2)^(2))=sqrt(256.896)`
`=16.028km//s`
`~=16`
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