Final answer:
The statement that scalar multiplication of a vector has no effect on its orientation is True. This concept is crucial in understanding the properties of vectors in physics, including vector addition and scalar interactions.
Step-by-step explanation:
The question addresses the concept of scalar multiplication in regards to vectors within the realm of physics. The statement saying scalar multiplication of a vector has no effect on its orientation is True. When a vector is multiplied by a scalar (which is simply a real number), the magnitude of the vector changes, but its direction, or orientation, remains the same unless the scalar is negative, in which case the vector reverses direction.
Regarding other vector concepts, it's also True that a vector can form the shape of a right-angle triangle with its x and y components, and we can use the Pythagorean theorem to calculate the length of the resultant vector when two vectors are at right angles to each other.
The vector for negative acceleration does indeed point in the opposite direction compared to a vector for positive acceleration, making that statement True. Additionally, the direction of a resultant vector depends on both the magnitude and direction of the added vectors, which is also True.