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## Homework Statement

a planet of mass m orbits a star. The Velocity at point A = 10^4 m/s the Radius at point A = 10^7, Vb = (10^4)/3, Rb = 3*10^7

Numerically calculate the angular momentum!

## Homework Equations

The main question is how would you calculate the mass?

## The Attempt at a Solution

L = rmv sintheta or L = IW but you need the mass.

E =1/2 *mv^2 - mMG/r but you need the mass for this as well. I also tried finding the value of mass by finding it in terms of one of the equations but you need more unknowns

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