Final answer:
In physics, vector addition involves adding two or more vectors together to obtain a resultant vector, while scalar multiplication involves multiplying a vector by a scalar. The order of vector addition does not affect the resultant vector, and scalar multiplication changes the magnitude of the vector but not its direction.
Step-by-step explanation:
In physics, we can perform vector addition and scalar multiplication using online calculators.
Vector addition involves adding two or more vectors together to obtain a resultant vector. The addition of vectors is associative and commutative, meaning that the order in which vectors are added does not affect the resultant vector.
Scalar multiplication involves multiplying a vector by a scalar, which is a real number. Scalar multiplication changes the magnitude of the vector but does not affect its direction.