1. The problem statement, all variables and given/known data M1 = 7.0 kg M2 = 3.0 kg Coefficient of friction between two blocks: 0.4 Angle of incline: 35 degrees Ramp is friction less 2. Relevant equations For Mass 1: ΣF1x = m1a1 -m1gsinθ + T + μkN = m1a1 (1) ΣF1y = 0 N = m1gcosθ (2) For Mass 2: ΣF2x = m2a2 -m2gsinθ + T - μkN = m2a2 (3) ΣF1y = 0 -m2gcosθ + N + N1 = 0 (4) 3. The attempt at a solution I assumed both accelerations are the same. Thus a1=a2 ⇒ a I subtracted equations (1) & (3) -m1gsinθ + m2gsinθT + 2μkN = m1a - m2a (5) (2) into (5) and solve for acceleration which gives me 2.25 m/s2 Does it look right? Also, how can I know if the speed of m1 is increasing or decreasing?