A conveyor belt, moving slowly at a constant speed, passes through a small window in a wall which is high enough to accommodate a single block, but a careless employee stacks two blocks on the belt. The one at the bottom, block 1 which has mass m1=m1=3.43kgkg, continues, without slipping against the belt, through the window. (The belt continues without slowing.) The one on the the top, block 2 with mass m2=m2=1.97kgkg, presses firmly against the wall and slips across the lower block. The same coefficients of friction, μs=μs=0.55 and μk=μk=0.21, apply between the pair of blocks and between the block and the belt.
Weights, if required, will be denoted with the corresponding subscript of the block as F⃗ g,iF→g,i, for i=1,2i=1,2.
The normal force exerted by object aa on object bb, if required, will be denoted as F⃗ n,a→bF→n,a→b for a,b∈{1,2,belt,wall}a,b∈{1,2,belt,wall}, but a≠ba≠b.
The force of kinetic friction exerted by object aa on object bb, if required, will be denoted as F⃗ k,a→bF→k,a→b for a,b∈{1,2,belt,wall}a,b∈{1,2,belt,wall}, but a≠ba≠b.
The force of static friction exerted by object aa on object bb, if required, will be denoted as F⃗ s,a→bF→s,a→b for a,b∈{1,2,belt,wall}a,b∈{1,2,belt,wall}, but a≠ba≠b.
What is the magnitude, in newtons, of the force of friction exerted by the conveyor belt on the block on the bottom, block 1?