You are Here: Home >< Maths

# Request for mark schemes/help with question Watch

1. I'm currently doing the M2 WJEC June 2010 paper and I would really appreciate it if someone could link me to where I could view the mark scheme. I've tried Google to no avail, I can only find the Pure and Further Pure mark schemes.

Alternatively, I'm currently stuck on question 2b. "Calculate the value of t when the velocity of P is perpendicular to the vector 2i - j." The position vector r of particle P is (3t^2 + 1)i + (13t - 2t^2)j. If anyone could help me with this question it would be greatly appreciated. I missed two weeks of school when we were studying this topic and I still don't fully understand what to do, or even where to begin.

(Also, if anyone could direct me to the general thread where requests for past papers are, instead of me posting a new thread, I'd be very thankful.)
2. (Original post by Marucs)
Alternatively, I'm currently stuck on question 2b. "Calculate the value of t when the velocity of P is perpendicular to the vector 2i - j." The position vector r of particle P is (3t^2 + 1)i + (13t - 2t^2)j. If anyone could help me with this question it would be greatly appreciated. I missed two weeks of school when we were studying this topic and I still don't fully understand what to do, or even where to begin.
To find the velocity vector, differentiate the position vector with respect to t.

Two vectors are perpendicular when their dot product equals zero, so find the dot product of the velocity with 2i - j, set this equal to zero, and solve for t.

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 16, 2013
Today on TSR

### Am I pregnant?

...or just paranoid?

### A robot wrote Harry Potter?

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

### 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

## 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.