# Physics(Stress & Strain)

posted by
**Danny** on
.

1) Calculate the tensile stress in a 33.000mm diameter rod subjected to a pull of 30.000kN.

ANS= MPa (Round to 3 decimal places)

Diameter = 33.000mm = 0.033m

30.000kN = 30000N

Area = pi*d^2/4

= 3.1416 * 0.033^2/ 4

= 3.1416 *0.001089/ 4

= 0.0034212024/ 4

= 8.553006*10^-4

= 0.0008553

Stress= Load/Area

= 30000/ 0.0008553

= 35075412.14Pa

= 35075.41214kPa

ANS = 35.07541214MPa

2) Consider that the rod was originally 1.000 meters long, and it was stretched 1.110mm by the pulling force. Calculate the strain produced in the rod.

ANS=(6decimal places)

1.110mm = 0.00111m

= 0.00111m/1m

ANS = 0.001110

Please check. Thank you.