1. The problem statement, all variables and given/known data There is a block of 1kg (m1) resting frictionless on another block of 5kg (m2). m1 is connected by a horizontal spring to m2. m2 is resting on an inclined plane of 45°. Between m2 and the plane there is friction. A force of 200N is applied on m2, pushing it upwards. F=200N, m1=1kg, m2=5kg, f=0.2, k=100N/m, initial spring length= 0.20m, g=10m/s² What is the spring length at equilibrium? 2. Relevant equations F=m*a F=k*spring length Friction W= (reaction force R)*f 3. The attempt at a solution Increase in spring length = l I start with 4 equations: F - w*cos45 - R*cos45 - k*l = (m1+m2)*a m1*g + m2*g - w*sin45 - R*sin45 = 0 w=0.2*R k*l=m1*a Solving this i get a=20m/s² which can't be right.