1. The problem statement, all variables and given/known data See the attachment. We're asked to find the masses of M1 and M2. I'm wondering how this is possible, 'cause there's two variables and only one known? Do I have to use sine/cosine law? m3 = 0.1998 kg T3 = (0.1998 kg)(-9.80 m/s^2) = -1.96 N Vertical angle A (between T3 and T1) = 38.0 degrees Vertical angle B (between T3 and T2) = 27.0 degrees 2. Relevant equations F = ma F = ma sin (Θ) 3. The attempt at a solution I tried to solve with algebra: m1 g sin (A) + m2 g sin (B) = m3 g Gravity cancels. m1 sin (A) + m2 sin (B) = m3 g ...And that's about as far as I got :( Any help/hints would be appreciated muchly.. the Physics head decided we should only get two days to do our labs.. it's due tomorrow.