You are Here: Home >< Maths

Maths a level questions

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. For the graph, how do you get average velocity and average speed for the dog? I got it wrong as it did speed= 150/100 and velocity=-100/100 but the answers should be speed=4 4/9 ms^1 and velocity= -1 1/9 but how?
2. (Original post by Lucofthewoods)
For the graph, how do you get average velocity and average speed for the dog? I got it wrong as it did speed= 150/100 and velocity=-100/100 but the answers should be speed=4 4/9 ms^1 and velocity= -1 1/9 but how?
Average speed is the total distance travelled divided by the time taken.
Average velocity is the displacement divided by the time taken. Make sure you know how to calculate distance and displacement from the graph - they are not the same.
3. (Original post by Lucofthewoods)
For the graph, how do you get average velocity and average speed for the dog? I got it wrong as it did speed= 150/100 and velocity=-100/100 but the answers should be speed=4 4/9 ms^1 and velocity= -1 1/9 but how?
Average speed is total modulus(distance) travelled/total time

Average velocity is total distance travelled/total time.
4. (Original post by Lucofthewoods)
For the graph, how do you get average velocity and average speed for the dog? I got it wrong as it did speed= 150/100 and velocity=-100/100 but the answers should be speed=4 4/9 ms^1 and velocity= -1 1/9 but how?
The total time is 90 not 100 (look at the scale more carefully).

The total distance travelled is 150 one way, 150 back to the start and then 100 the other way.

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
your full birthday is required
1. Oops, you need to agree to our Ts&Cs to register

Updated: September 26, 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
Useful resources

Make your revision easier

Maths Forum posting guidelines

Not sure where to post? Read here first

How to use LaTex

Writing equations the easy way

Study habits of A* students

Top tips from students who have already aced their exams

Create your own Study Planner

Never miss a deadline again

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
Study resources

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.