- #1
jonander
- 15
- 4
- TL;DR Summary
- General equation for the magnitude of the difference vector of two parallel or antiparallel vectors
Hi everyone,
While finding the solution for one of my exercises, I found the following answer. I'm seriously questioning if the equations provided in that answer are reversed. According to my understanding, if two vectors ##\vec{S}## and ##\vec{T}## are parallel (same direction) the magnitude of the difference vector ##\vec{S}-\vec{T}## is:
$$
||\vec{S}| - |\vec{T}||
$$
If the vectors are antiparallel, the magnitude of the difference vector is:
$$
|\vec{S}| + |\vec{T}|
$$
Did the author of that answer wrote the equations in the wrong places or am I missing something?
Thanks.
While finding the solution for one of my exercises, I found the following answer. I'm seriously questioning if the equations provided in that answer are reversed. According to my understanding, if two vectors ##\vec{S}## and ##\vec{T}## are parallel (same direction) the magnitude of the difference vector ##\vec{S}-\vec{T}## is:
$$
||\vec{S}| - |\vec{T}||
$$
If the vectors are antiparallel, the magnitude of the difference vector is:
$$
|\vec{S}| + |\vec{T}|
$$
Did the author of that answer wrote the equations in the wrong places or am I missing something?
Thanks.