We had an interesting visitor to our classroom today! Fia brought in a Coca-Cola can that had been fitted with battery-powered wheels that allowed it to crawl slowly forward.

We estimated it would take 30 – 40 seconds for the can to travel 1m  on the smooth table.

It actually took 23 seconds to travel this distance. We used a stopwatch to ensure our timings were accurate.

We then estimated it would take 40 – 50 seconds for the can to travel 1m on the rough carpet.

The can spent 1 minute and 23 seconds to complete 1m on the carpet.

The higher level of friction on the carpet accounted for the longer amount of travel time.