Is stress a vector?
Stress has both magnitude and direction but it does not follow the vector law of addition thus, it is not a vector quantity. Instead, stress follows the coordinate transformation law of addition, and hence, stress is considered as a tensor quantity.
What is the concept of stress vector?
The resultant vector is defined as the surface traction, also called stress vector, traction, or traction vector. given by at the point associated with a plane with a normal vector : This equation means that the stress vector depends on its location in the body and the orientation of the plane on which it is acting.
Is stress a vector or tensor?
3 Answers. Stress is a tensor1 because it describes things happening in two directions simultaneously. You can have an x-directed force pushing along an interface of constant y; this would be σxy.
Is stress a vector quantity justify?
Direction of stress is opposite to the direction of the load. Compare compressive stress and tensile stress while both being longitudinal stress. They are differentiated based on the direction and a physical property which has magnitude and direction can be termed as vector quantity. Stress is hence a vector quantity!
Is bulk stress scalar or vector?
therefore, stress is not a vector quantity but is a scalar quantity.
Who made Hooke’s Law?
scientist Robert Hooke
Is strain a vector quantity?
Strain is neither a scalar nor a vector. In the most general case it’s a 2-dimensional symmetric tensor, defined by 9 numbers at any point. (Only 6 of the numbers are independent, because of the symmetry).
Is heat a vector or scalar?
Answer: Heat is an aggregate measure of the amount of energy stored in a system of particles (a single particle doesn’t have a temperature), but it doesn’t point in any particular direction, so it’s a scalar.
Is surface tension scalar or vector?
Also, surface tension does not follow the vector laws of addition. Hence, surface tension is not a vector quantity. Note: Surface tension and pressure are in fact tensor quantities of rank zero, which in essence, means that they can be considered as scalar quantities.
Is strain a quantity?
Strain is the ratio of change in dimensions of the body to the original dimensions. Because it is a ratio, it is a dimensionless quantity.
Which comes first stress or strain?
Stress strain curve is a behavior of material when it is subjected to load and frm SN curve we can say stress generates only when there is deformation (or it is about to deform) caused by some mechanical or physical forces. Therefore Strain always comes first then only stress generates.
Are angles dimensionless?
Angles measured in radians are considered to be dimensionless because the radian measure of angles is defined as the ratio of two lengths θ=sr (where s is some arc measuring s-units in length, and r is the radius) however the degree measure is not defined in this way and it is said to be dimensionless too.
Which quantity is similar to stress?
Stress is the force per unit area so it has the same dimension as pressure. From here, we can see that the dimension of momentum and impulse is equal.
Is stress and pressure have same dimensions?
Stress and pressure though having same dimension are different quantities as pressure is mainly subjected to fluids where as stress guides the properties of solid the pressure is applied perpendicular to the surface but stress can be parallel as well as perpendicular to the surface.
Which does not have the same dimensions?
Which of the following pairs does not hace similar dimensions? Hence, dimensions of surface tension and tension are not equal. Panck’s constant and angular momentum have dimensions [ML2T-1].
Does tension and surface tension have same dimension?
a) Tension and surface tension. Since tension is a type of force, it will also have the same dimensional formula as the dimensional formula of force i.e. [MLT-2].
Is surface tension and spring constant same?
2: Both are equivalent to force per unit length.
Is surface tension dimensional constant?
The surface tension of a liquid is measured as the force per length acting on an imaginary line drawn tangentially on the liquid’s free surface. SI unit: Nm-1 or Jm-2 and its dimension formula for surface tension is [MT-2]. The quantity is scalar.