Engineering Board Exam Reviewer · Engineering Mechanics · medium
A steel bar (E = 200 GPa) with a length of 3 m and a cross-sectional area of 290 mm2 carries an axial load of 19 kN. What is its elongation?
- 0.001
- 1.966
- 0.491
- 0.983
Answer
D. 0.983
Solution
= PL/(AE) = (19 × 1000 N)(3 × 1000 mm) / (290 mm2 × 200 × 1000 MPa) = 0.983 mm.
More Engineering Mechanics questions
- An axial load of 24 kN is applied to a bar with a cross-sectional area of 350 mm2. What is the normal stress in the bar?
- A shear force of 11.5 kN acts over a cross-sectional area of 530 mm2. What is the average shear stress?
- A material has an ultimate stress of 410 MPa and is designed with a factor of safety of 2.5. What is the allowable stress?
- A steel bar (E = 200 GPa) with a length of 2.5 m and a cross-sectional area of 270 mm2 carries an axial load of 17 kN. What is its…
- An axial load of 22 kN is applied to a bar with a cross-sectional area of 325 mm2. What is the normal stress in the bar?
- A shear force of 10 kN acts over a cross-sectional area of 500 mm2. What is the average shear stress?
- A material has an ultimate stress of 400 MPa and is designed with a factor of safety of 2. What is the allowable stress?
- A steel bar (E = 200 GPa) with a length of 2 m and a cross-sectional area of 250 mm2 carries an axial load of 15 kN. What is its elongation?
- An axial load of 20 kN is applied to a bar with a cross-sectional area of 300 mm2. What is the normal stress in the bar?
- A point on the rim of a wheel of radius 0.6 m rotates at an angular velocity of 7 rad/s. What is the linear (tangential) speed of that…