How to calculate the vector product vector a * vector b (how to determine the size and direction) Note that * is not a dot product, and the result is not a number, but a vector Take the operational expression of physical quantities such as moment and angular momentum as an example

How to calculate the vector product vector a * vector b (how to determine the size and direction) Note that * is not a dot product, and the result is not a number, but a vector Take the operational expression of physical quantities such as moment and angular momentum as an example

Let vector a cross multiply vector b equal to vector C
Then there is the size of vector C = the size of vector a * the size of vector b * sin
Vector C is perpendicular to vectors a and B, that is, perpendicular to the plane determined by vectors a and B
The direction of vector C is determined by the right-hand helix, that is, the four fingers sweep from vector a to vector b (sweep)