Elliptical Orbit Homework: Find Angular Momentum

AI Thread Summary
To find the angular momentum of a comet in an elliptical orbit around the sun, the mass of the comet (5x10^16 kg), its distance from the sun at perihelion (10^6 m), and its linear velocity (1.5x10^7 m/s) are essential. The angular momentum can be calculated by multiplying the mass, velocity, and distance from the focus (sun). Participants in the discussion express uncertainty about the calculations but confirm that the correct approach involves multiplying these three values together. Understanding the definition of angular momentum is crucial for solving the problem effectively.
missnuss
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Homework Statement


A comet of mass 5x10^16 kg moves in an elliptical orbit around the sun, with the sun at one focus. At the perihelion, 10^6 m, the comet has a linear velocity of 1.5x10^7 m/s. Find the angular momentum of the comet with respect to a focus at the sun.


Homework Equations





The Attempt at a Solution

Ya, I have nothing except 0<e<1, Vmin<E<0
 
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How about: What's the definition of angular momentum?
 
Ok. So basically you multiply the three together? Sorry if I am slow.
 
missnuss said:
Ok. So basically you multiply the three together? Sorry if I am slow.
Yes. -- I mean yes to multiplying them together.

I have no idea about you're being slow or not.
 
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In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
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