Inertia Racetrack

Track 1 Track 2 Track 3 Track 4 Track 5 Track 6 Track 7 Track 8 Track 9 Track 10 Help
Blue racing car Orange racing car

Player 1

Player 2


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Comment recorded on the 28 May 'Starter of the Day' page by L Smith, Colwyn Bay:

"An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"

Comment recorded on the 26 March 'Starter of the Day' page by Julie Reakes, The English College, Dubai:

"It's great to have a starter that's timed and focuses the attention of everyone fully. I told them in advance I would do 10 then record their percentages."

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Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.


If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes.

It may be worth remembering that if should go offline for whatever reason, there are mirror site at that contains most of the resources that are available here on

When planning to use technology in your lesson always have a plan B!


Monday, July 25, 2022

"Although Inertia Racetrack is a two-player game here is a suggestion for how to enjoy this activity as a one-player challenge. Use only the blue car (set the other car’s vector components to zeros or let it crash) and try to drive around the course using the minimum number of moves. Claim a trophy to record your achievement then try to improve on your personal best.

The best I have seen so far are:
Track 1: 13 moves
Track 2: 19 moves
Track 3: 30 moves
Track 4: 25 moves
Track 5: 33 moves
Track 6: 33 moves
Track 7: 38 moves
Track 8: 37 moves
Track 9: 40 moves
Track 10: 50 moves

If you manage to complete a track in a smaller number of moves please let me know by copying and pasting you list of ordered pairs into a comment on this page (link below)."

Alex Smyth, Perth

Monday, October 23, 2023

"Track 4: 25 Moves
[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐],[⭐, ⭐]

[Transum: Well done Alex for beating the previous record of 27 - I have hidden your route so as not to spoil the fun for others] "

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The objective of the game is to be the first player to get around the racetrack and reach the red FINISH line.

Each player adjusts the numbers on their race vector by clicking on one or more of the red buttons at the sides of their vectors. This only allow a maximum increment of one each time (this provides the notion of inertia).

When both players are happy with their settings the 'Run Vectors' button can be clicked.

Continue this process until at least one of the plays reaches the FINISH line.

This racetrack uses some futuristic technology that allows two racecars to occupy the same space at the same time - Amazing!

If the race is a draw try racing again on one of the other racetracks (levels). If one player is a clear winner a virtual trophy can be claimed by that player.

The titles Player 1 and Player 2 are editable so your names can be typed in.

Example race

The image above shows a typical race that the blue car wins. The orange car crashed due to over-enthusiastic inertia!