x Turn on thread page Beta
 You are Here: Home >< Maths

# M1 vectors help please watch

1. Attachment 538139538141

Hi for this question (photos), part D where you have to find when it is past 15km again

Im confused to why the equation for distance is being squared? Why are we squaring the equation am I missing some concept?
Attached Images

2. (Original post by eyeman567)
Attachment 538139538141

Hi for this question (photos), part D where you have to find when it is past 15km again

Im confused to why the equation for distance is being squared? Why are we squaring the equation am I missing some concept?
I am not sure what you mean by squaring the equation, you are simply substituting d = 15 into the equation from the previous part?
3. If you are referring to why we square both sides of the equation in part C, this is simply to remove the ugly square root that we get from finding the magnitude of the PQ vector!
4. (Original post by Mav1)
If you are referring to why we square both sides of the equation in part C, this is simply to remove the ugly square root that we get from finding the magnitude of the PQ vector!
Ah, I see, I realize that by the 15 being squared it is the same as the equation normally. Thank you!

Turn on thread page Beta
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:
Updated: May 25, 2016
Today on TSR

### 'All unis should close except Oxbridge & RG'

What do you think?

### Should I fight a topless girl for my BF?

Discussions on TSR

• Latest
Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE