You wish to design a cantilever beam with a square cross section and length L that can support an end load of F without yielding. You also wish to minimize the amount the beam deflects under load. Determine the appropriate material performance index to maximize or minimize.

An electric motor is used to drive a power press which makes steel turning moment diagrams 323 pressings from a metal sheet. the motor runs at a mean speed of 50 rev/s. the torque required is 10.0nm for 0.2s, followed by 1.0nm for0.3 s with this sequence then being repeated. what is the minimum power required of the motor and the moment of incrtia required for the t1ywhcel if the speed fluctuations are to be restricted to 1.5%?