A continuous-fiber composite is loaded axially, in the direction of fiber alignment. In this case, we may model the fiber and matrix as two materials in parallel: the two materials "share" the applied load F , so that F = Ff +Fm; and the two materials experience the same normal strain in the direction of the applied load. Develop an expression for the effective elastic modulus of the composite material in terms of the moduli and volume fractions of its fiber and matrix constituents.