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Homework Help: Velocity of coment? help please

  1. Apr 9, 2009 #1
    Velocity of coment?? help please

    1. The problem statement, all variables and given/known data

    A certain comet of mass m at its closest approach to the Sun is observed to be at a distance r1 from the center of the Sun, moving with speed v1. At a later time the comet is observed to be at a distance r2 from the center of the Sun, and the angle between r2 and the velocity vector is measured to be θ. What is v2? For example, if a variable g is used in the question, type g. Use theta for θ, r_1 for r1, r_2 for r2, v_1 for v1 and m as needed.

    pic is attached so you can see what im looking at as well.

    im completely stuck dont even know where to begin!!

    Attached Files:

  2. jcsd
  3. Apr 11, 2009 #2


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    Science Advisor
    Homework Helper

    Hi fball558! :wink:

    (eughh … why is v1 in your diagram pointing up? :yuck:)

    Hint: conservation of … ? :smile:
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