1. The problem statement, all variables and given/known data Refer to diagram. Find acceleration of each block: n1,n2, n3 are coefficients of friction. if a force of 10 N acts on the middle block, find the acceleration of each. 2. Relevant equations F=ma 3. The attempt at a solution a1,a2,a3 are accelerations of bodies, taken from top to bottom. Fr1= Friction force for n1 Fr2= Friction force for n2 fr1+fr2=10 7*a1=fr2 2*a2=fr1 7*a1+2*a2=10 the middle block will be stationary with respect to ground. I cant understand where am I going wrong?????