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Wasseem92
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Homework Statement
The Earth is approximately 1.5x10^8 km from the sun. what is the Earth's angular momentum about the center of the sun. Note the mass of the Earth is 5.97x10^24.
Homework Equations
The Attempt at a Solution
I got the answer, but my question is, when finding the velocity: which is 2pir/time the Earth takes to revolve, do we use 2pi/time or 2pir/time. i have this question because my teacher in some examples uses r and in some doesnt. Can someone help me with when and why we use the radius?