Problem 3. The two rods (cross-sectional area A, elastic modulus E) are pinned together at B. The pin at B slides in a horizontal track, so that it is constrained to have zero displacement in the vertical direction. Please calculate the axial forces in bars C and D as fractions of the applied force P. Be sure to indicate tension or compression. Note carefully that the track will, in general, apply a vertical reaction to the pin at point B. B P D L 30° 45°