If we take a point on this graph, for example (2,4), the y-value is the square of the x-value.
Using the second derivative test to determine concavity and inflection points
Since acceleration is the time derivative of velocity, the material acceleration can be derived from the definition of material derivative as follows:
Using only direction of vector
UNIT 2: DERIVATIVES
For an alternative derivation, we can make use of the usual vector operations to express the total second derivative of the absolute position vector r.
Vector addition for vectors at any angle | Adding vectors | How to add vectors
Vector addition for perpendicular vectors | Adding vectors | How to add vectors
Schematic of a fully connected layer and a matrix multiplication without transfer-function applied.
Subtracting vectors that are perpendicular | Vector subtraction of perpendicular vectors | More at plainphysics.com