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No, stress is not a dimensionless quantity. By application of a simple equation of stress, axial stress, we can determine the primary dimensions (Length, Time, Mass, Etc.) of stress.
Stress (sigma) = Force (F)/Area (A)
Force has the primary dimensions of: (Mass*Length)/Time^2
Area has the primary dimensions of: Length^2
Therefore we can determine that Stress has the primary dimensions of: Mass/(Length*Time^2)
Common units include: Newtons (SI), psi (pounds mass per square inch)
You may have confused stress with strain. Strain has primary dimensions of Length/Length and therefore it is often expressed without any attached units.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agono,stress is not a vector quantity.because stress/strain=youngs modulus.if stress will be a vector quantity youngs modulus will be a vecotor quantiy because stress is dimesionless which is not true
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Does a dimensionless quantity have a unit?
"Dimensionless" means it doesn't have a unit.
Which of the following is dimensionless quantity a. stress b. strain c. momentum d. force?
Strain is dimensionless quantity because strain is the ratio of the same quantities like change in length/original length,,change in volume/original volume. e.g tensile strain=(change in length)/(original length)=m/m (S.I unit) so its a dimensionless quantity.
Can a quantity have units but still be dimensionless?
No. "Dimensionless" means there are NO units involved.
Can a quantity have units but still be dimension less give example?
No, "dimensionless" means, precisely, that there are no units.
Is there any physical quantity having no dimension but unit only?
Yes. Look at the Wikipedia aritcle on "dimensionless quantity". Here are two examples: 1. Angles, when measured in radians, can be considered the ratio of the arc of a circle to the radius. The result is a dimensionless number. 2. The coefficient of friction, which is the ratio between two forces. Dimensionless quantities often appear as a result of taking the ratio of two measurements.
Which dimensionless quantity has unit?
If a quantity is "dimensionless", that means it has no units, and it's just a number.
Is specific weight is a dimensionless quantity?
energy/mass example: calories/gram
Does a dimensionless quantity have a unit?
"Dimensionless" means it doesn't have a unit.
Which of the following is dimensionless quantity a. stress b. strain c. momentum d. force?
Strain is dimensionless quantity because strain is the ratio of the same quantities like change in length/original length,,change in volume/original volume. e.g tensile strain=(change in length)/(original length)=m/m (S.I unit) so its a dimensionless quantity.
What are dimensionless numbers?
the dimensionless numbers have the definition as that of dimensionless groups, and have all the properties which dimensionless groups have.
Can a quantity have units but still be dimensionless?
No. "Dimensionless" means there are NO units involved.
What is the rule of dimensionless quantity?
infinity
Can a quantity have constant value and be dimensionless?
Yes. Conversion factors will generally be dimensionless constants.
Is the magnitude of a vector quantity a dimensionless number?
Yes, the magnitude of a vector is a scalar.
Can a quantity have units but still be dimension less give example?
No, "dimensionless" means, precisely, that there are no units.
What are the units of the coefficient of friction?
The coefficient of friction is a scalar quantity which has no direction which does not have an angle.
What are the units that friction is measured in?
The coefficient of friction is dimensionless; it has no units.
