A rocket is 1.00x10^10m from a moving star moving at a speed of 1.00x10^5 m/s with a total energy of -1.67x10^17 J when it experiences a gravitational force magnitude of 6.67x10^7 N. It turns on its thrusters and its speed as well its distance to the star doubles by the time the thrusters are turned off.(adsbygoogle = window.adsbygoogle || []).push({});

Find the rocket's mass, the star's mass

Prove the fist trajectory is elliptical and not circular.

If a=1.11x10^10 m for the first trajectory, find the period.

Find the work done by the thrusters in changing trajectories.

How would I star this problem? It is the first part of physics ( Mech)

I know r'= 2r and v'=2v

would I use the orbtial formulas to find the mass or something else. Any hints or anything will be helpful thank you.

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# Homework Help: Rocket and orbital problem

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