ok..haveing trouble understanding some examples in the book....(adsbygoogle = window.adsbygoogle || []).push({});

1) 1000kg rocket is fired striat up, need rocket to escape and never return. what speen does rocket need to escape from grav pull to never come back?(non rotating earth)

i know rocket cant stop so or it will be drawn back into earth. so...

K2+U2=K1+U1 is:

0+0=(1/2)m*v^2 - (GMm)/R)

whats with the 0+0?

then it goes to:

Vescape= v1 = SQRT(2GM/R)

howd they get to that equation??

i know the answers and stuff its in the book, i just dont know how they got to those equations

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# Homework Help: STUDYING FOR TEST, need a tutortial

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