06 December 2017

Friction Testing

This week we conducted an experiment to test the friction created by different types of sport balls on the same surface of concrete.

Our Aim:
To find which ball produces the most friction when connecting with a concrete surface, therefore determining the speed of motion

Materials used:
1 meter ruler
1 timer

Ball Types:

  • Basketball
  • Netball
  • Soccer ball
  • Rainbow ball
  • Tennis ball
  • Rubber ball
  • Hockey ball
  • Marble

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.

Post Discussion:
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.

Consistent Variables:

  • test distance (1 meter)
  • all groups used the exact same balls
  • all tests were done on the same concrete surface

Inconsistent Variables:

  • 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!

1 comment:

  1. Friction is a very interesting force