1. Grand Prix

2. Here is a simple race track:
Assuming a racing car is 2m wide, and travels around the centre line of the track, work out how much further the right wheels travel than the left wheels.

3. Solving the simple race track:
The straights are all the same, so 2x100 = 200m for each wheel
50m
80m
100m
The two corners together make a circle.
The blue circle has a diameter of 80 – (30 ÷ 2) + 1 = 66m
So the outside wheel circle is 66 = m (2dp)
Which makes m (2dp) in total.
The green circle has a diameter of 80 – (30 ÷ 2) - 1 = 64m
So the inside wheel circle is 64 = m (2dp)
Which makes m (2dp) in total.

4. Making it Equal
You have bought a square field, 100m on each side, and enough tarmac for 600m of track.
Can you design a race track that makes all the wheels travel the same distance?
Explain that this is the general challenge, and then move on to the next slide to explain the scoring
Use a scale of 1cm = 1m to draw your track

5. You need to have…
A clear proof that the wheels will travel equal distances
An imaginative design of track
As close as possible to 600m of track used
Your full track inside the 100m square field

6. Give a mark out of 10 for each of…
A clear proof that the wheels will travel equal distances
An imaginative design of track
As close as possible to 600m of track used
Your full track inside the 100m square field
10 mins to mark your neighbouring group
10 mins to mark your own group