To find which ball produces the most friction when connecting with a concrete surface, therefore determining the speed of motion
1 meter ruler
- Soccer ball
- Rainbow ball
- Tennis ball
- Rubber ball
- Hockey ball
We discovered that we had a range of different results that suggested a number of different ideas about which ball was fastest, slowest or produced the most/least amount of friction.
We decided that the experiment we conducted was an unfair test as there were too many inconsistencies and differences between different groups and different tests.
- test distance (1 meter)
- all groups used the exact same balls
- all tests were done on the same concrete surface
- Students ability with timing and different tools to time
- Amount of force applied to the ball causing it to move.
Today we are going to looking at our last 2 experiments and why/ how they were unfair tests and how we can adjust them to ensure they produce accurate and fair results. We will keep you posted!