Fair Testing Our Cars

We have been learning about Forces.  At the moment we are learning about FRICTION.  We know that friction can make things go fast or slow.  Today we made some Mobilo Cars and tested them on different surfaces to see how they went.  Our testing showed that smooth surfaces made our cars go further because there was not much friction and the rough surfaces made our cars not go very far at all, some of the rough surfaces even made our cars crash!
Here's some of our thoughts after all the testing was finished and we looked at our results...

What we found interesting:

• pushing the cars fast
• pushing along the pavers and watching the car bump 
• building the cars

What didn’t surprise us:

• that it didn’t go very good on the bark
• that the car didn’t go very fast at all
• because the bark was all bits and pieces, it made it crash
• it went fast on the concrete

What did surprise us:

• that it went well on the concrete
• that my car didn’t go fast even on the smooth floors
• that my car went really fast and far on the lino

Making our cars:

Testing out our cars:

Recording our results after every test:

Talking about our findings:

 A Sample of our Results: