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## Homework Statement

a satellite is set to orbit a planet of mass 4X 10^20 kg .

It is placed at a distance of seperation of 10^7m with a velocity of 30 degrees to the line connecting the center of the planet and the satellite. What will be its eccentrity fo orbit? (Answer is .89)

## Homework Equations

ME = KE + PE

KE = 1/2 mv^2

PE = -GMm/r

## The Attempt at a Solution

I did 40m/s *sin (30) = vertical velocity.

Then, I plugged it into the equation -GMm/r = .5m(40m/s *sin (30))^2 + -GMm/r

I didn't get the answer though...

please help!