You are Here: Home >< A-levels

# Vectors

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. I understand how to add/subtract etc with vectors, however i don't understand why should it strictly be tail to head ? for instance if we have vector A and B we would go about adding them by placing them tail to head from other, but why should be in this format why can't it be for instance tail to tail?
2. A vector carries direction with it, if you were to try add vectors tail to tail you would be subtracting one of them as it would be in the wrong direction (multiplied by -1)
If you draw the diagram of two vectors head to tail and then tail to tail you would see they represent different things.
3. Because the whole vector concept encompasses magnitude AND DIRECTION i.e. size AND direction; if you draw the vectors any other way than prescribed, the direction would be erroneously altered.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: October 13, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets