Question

Is stress a vector quantity or scalar quantity

Answer 1

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Stress is actually neither a vector nor a scalar. Stress is essentially a 2-vector, whose components can be represented in a matrix, and the basis of the 2-vector are 2-blades. ... To put into perspective, a scalar is a quantity that simply has a value and no direction, no “extent”.

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Answer 2

Answer:

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We know that:

✦A scalar or scalar quantity in physics is one that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. A scalar is usually said to be a physical quantity that only has magnitude, possibly a sign, and no other characteristics.

✦Vector, in physics is a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude.

According to terms in Physics,Scalar is a quantity having only magnitude.A vector is a quantity that has magnitude and direction both.Tensor is a quantity having magnitude, direction, and plane too.Stress is a tensor as it obeys the coordinate transformation law. Stresses are not vectors because they do not combine according to the parallelogram law of addition. Instead, stresses are much more complex quantities than the vectors and are called tensors. Stress is a second-order tensor. Also, it has a dimension too.