Check factor of safety for fatigue failure of h02 problem 4) after five years of continuous operation at crank speed 15 rpm with 99% reliability. use ½ x 1 inch 6061-t6511 (or 6061-t6) aluminum bar stock available from online metals. do not include stress concentrations for connections at a and b. use falt = 2200 lbf and fmean = 1800 lbf on each bar and use case 3) goodman failure.

Ireally don’t know

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current