Turn on thread page Beta
    • Thread Starter

    I'm looking at some past exam papers and on the June 02 M1 Edexcel one Q5 is "A particle P of mass 2kg moves in a plane under the action of a single constant force F newtons. At time t seconds the velocity of P is vms^-1. When t=0 v = (-5i + 7j) and when t = 3, v = (i -2j)." There are various parts and then question e is "Find the time at which P is moving parallel to the vector i+j". I really have no idea where to go with this and I'd greatly appreciate a pointer as to what this means. Bear in mind my vector education is somewhat rudimentary.

    EDIT: Sorry I'm a complete moron who didn't think to search. Related threads came up with " if it is parallel to 1i+1j then the i+j components must be in the same ratio as they are with the vector 1i+1j. so your i value must equal your j value. So you make them equal and solve.". I'll have a try and come back if I have trouble.

    EDIT2: I still have no clue, actually. Can somebody help?

    EDIT3: Uh, nevermind. You just do what was said in what I quoted. Apologies for this silly thread.
Submit reply
Turn on thread page Beta
Updated: February 7, 2010
Do you think parents should charge rent?
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

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

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