A strain gage with a resistance of 120 Ω and a gage factor of 2 has a resistance change of 0.005 Ω. a) Determine the microstrain measured by the gage. b) If this microstrain is due to the axial...

A strain gage with a resistance of 120 Ω and a gage factor of 2 has a resistance change of 0.005 Ω. a) Determine the microstrain measured by the gage. b) If this microstrain is due to the axial elongation of a rectangular steel bar with a cross sectional area of 0.4
 10^-3
m², determine the axial force acting on the bar.