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Homework Help: What is the angle?

  1. Dec 13, 2014 #1
    1. The problem statement, all variables and given/known data

    What would angle theta have to be (in terms of m1,m2,theta,and g) for block 1 to slide up the incline with a constant velocity?https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-xpa1/v/t34.0-12/10822629_888792511161232_525549482_n.jpg?oh=d4562de825a1f9415f4e8af0492bf6c5&oe=548EDA23&__gda__=1418719036_0909ad5a8f6240bb4b7f7ad07f541e09
    2. Relevant equation
    Law of sines

    3. The attempt at a solution
    I did vector addition for mass 1, I then did law of sines to figure out theta, but I always have like 2 thetas so I need a little help on this ( This is my first year in AP physics so sorry if this seem like a stupid question).
  2. jcsd
  3. Dec 14, 2014 #2


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    The problem statement as pictured is incomplete. Please check your notes for missing details.
  4. Dec 14, 2014 #3
    Are u sure questions complete ?otherwise we can't find theta in just m1,m2 and g alone. We need one more angle (may be phi) along with the above terms.if that's not available then there must be some other clue in the question to relate two angle. Please check .
  5. Dec 14, 2014 #4


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    Presumably one of those two references to theta should be a reference to the other angle in the picture (but its name is illegible).
  6. Dec 15, 2014 #5
    From you point of view reconsider sin. What is it without triangle?
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