You are Here: Home >< Maths

# M2 Help Watch

1. Hi,

I've done part one of this question, but I'm really struggling with part 2.

I'm struggling with both visualising and sketching the scenario, so any help would be appreciated, cheers

This was posted from The Student Room's iPhone/iPad App
2. (Original post by JRW1995)
...
Forget about part 2, for a minute.

Draw the diagram for part 1, with lines along the x, and y axis as appropriate.

Then mark on the centre of mass.

Now draw a line through A and the centre of mass.

Now rotate your page until A is furthest away from you and the line you have just drawn is vertical, coming towards you.

You now have the desired image for part 2.
3. (Original post by ghostwalker)
Forget about part 2, for a minute.

Draw the diagram for part 1, with lines along the x, and y axis as appropriate.

Then mark on the centre of mass.

Now draw a line through A and the centre of mass.

Now rotate your page until A is furthest away from you and the line you have just drawn is vertical, coming towards you.

You now have the desired image for part 2.
Thanks for your help,

I managed to get that drawn earlier as well as the AC diagonal, I then had 2 coordinates and the diagonal line and got stuck from there figuring out angles with lengths being in terms of A.

(If this description made no sense I will upload a photo tomorrow)

This was posted from The Student Room's iPhone/iPad App
4. (Original post by JRW1995)
...
It makes sense, but a photo might be useful anyway.

Yes, it's a little messy.

One way to find the angle would be find the angle BAC, and the angle BA centre-of-mass.

Then either subtract or add to get the desired angle - depending on whether the centre of mass is on the B side or D side of the line AC.

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: April 17, 2013
Today on TSR

### Last-minute PS help

100s of personal statements examples here

### Loneliness at uni

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.