Tension problem!! 1. The problem statement, all variables and given/known data Consider a force F = 887 N pulling 3 blocks of masses m1 = 9 kg, m2 = 16.9 kg, and m3 = 26.1 kg along a frictionless horizontal surface. The tension of the strings are T1 and T2 (see sketch). The equation of motion of m2 is given by 1. T1 − T2 = m1 a . 2. T1 − T2 = m2 a . 3. T1 = m2 a . 4. T1 − T2 = (m1 +m3) a . 5. T1 + T2 = m1 a . 6. T1 = (m1 + m3) a . 7. T1 + T2 = m2 a . 8. T1 = m1 a . 9. T1 + T2 = (m1 +m3) a . 2. Relevant equations F=ma 3. The attempt at a solution T1 = m2a T2 = m3a When I try to solve through substitution, I don't get any of the choices above. What do i do next?