How to find normal force<br>Understand what normal force refers to. Normal force refers to the amount of force use to counteract the force of gravity. [substeps] Imagine a block sitting on a table.
Normal force is pink
Normal force is like gravity, you cannot see it. Therefore it is definitely incorrect that normal force is pink. 
( z1 pink :ARG1 ( z2 force :ARG1-of ( z3 normal ) ) )