Terms and Units F Flow shear stress =o A dx velocity dx shear strain y y Force Area=A dx shear rate y dt y y y Moduls(solids)≤Gso Vis cosity(liquids)Flow y v y dt dx shear rate y dx shear strain A F shear stress                      cos ( ) ( ) Vis ity liquids Modulus solids G Terms and Units y Area = A Force velocity dx