Strength of materials tells us that if a load P is applied at the free end of a cantilever...

Strength of materials tells us that if a load P is applied at the free end of a cantilevered beam, then the tip displacement δ is given by δ = PL3/(3 EIcs), where L is the length of the beam and E and Ics are constants that depend on the material makeup and the geometry of the cross section, respectively. Determine an expression for the potential energy of a cantilevered beam loaded as shown.

Figure P4.88