Problem 12.4

Please wait for the animation to completely load.

A planet has an initial velocity in the y direction that gives it a slightly elliptical orbit around a star as shown in the animation (position is given in 10⁶ km and time is given in years).  Restart.

1. Determine the mass of the star. 
2. What is the correct orbital radius to give circular motion?  Drag the planet at t = 0 to determine this radius. You may also drag the gray blocks around to use them as temporary or permanent markers.  

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