Engineering Board Exam Reviewer · Engineering Mechanics · easy
Which of the following is a scalar quantity, not a vector?
- Force
- Weight
- Moment
- Mass
Answer
D. Mass
Solution
Mass has magnitude only and no direction, making it a scalar; force, weight, and moment all have both magnitude and direction.
More Engineering Mechanics questions
- According to the principle of transmissibility, the external effect of a force on a rigid body is unchanged if the force is:
- A rigid body, as idealized in statics, is a body in which:
- In engineering mechanics, statics is defined as the study of bodies that are:
- A steel bar (E = 200 GPa) with a length of 3.5 m and a cross-sectional area of 310 mm2 carries an axial load of 21 kN. What is its…
- An axial load of 26 kN is applied to a bar with a cross-sectional area of 375 mm2. What is the normal stress in the bar?
- A shear force of 13 kN acts over a cross-sectional area of 560 mm2. What is the average shear stress?
- A material has an ultimate stress of 420 MPa and is designed with a factor of safety of 3. What is the allowable stress?
- 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?
- 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?