The beam AB supports two concentrated loads P and Q. Thenormal stress due to bending on the bottom edge of the beamis 155 MPa at D and 137.5 MPa at F. (a) Draw the shear andbending-moment diagrams for the beam. (b) Determine the maximumnormal stress due to bending that occurs in the beam.

ME 3350 Notes – Week 6 7 – Energy Equation Stored Energy: Associated with given mass (kinetic→motion, potential→position, internal) Energy in transition: Moving between systems (heat→temperature difference, work→external forces) Consider a system: Work done by fluid on surroundings, heat to system from surroundings dE ∆ E=E −2 =Q1W =Q−W ´ RTT: dt δ ρedV + ρev∙dA=Q−W ´ ´ δt CV CS Physical Interpretation: Time rate of change (RoC) of stored energy in CV @ t + Net efflux of stored energy through CS @ t = Rate of heat addition to fluid in CV @ t – Rate of work done by fluid in CV @ t, 1 2