Physics

Today Anna and I did the independent physics task.  Our hypothesis wasn't correct because we guessed that the tennis ball would roll faster on the wooden walk-way. The tennis ball rolled on the concrete the quickest. The times were: carpet time: 2.85 seconds, wooden walk-way time: 2.65 seconds and finally the concrete time: 2.35 seconds. So as you can see our hypothesis wasn't correct.  We believe that the concrete was smoother than the wooden walk-way, and this is why we got the results we did.  The concrete had less friction to slow the tennis ball down than the wooden walk-way.