Forces in action
This week in science, we have been looking at different forces in action. We have learnt about;
- air resistance
Which car will need the greatest force (push/pull) to move?
Why do you think that?
In groups, we set up an experiment to test our theories.
Here is one group's findings.
Prediction: It will take more force to move on a rough surface
- A toy car
- 3 rubber bands
- a pencil
- a ruler
- different surfaces
Method: attach an elastic band to the front of the car using tape, we then used a pencil to pull the band and measure how far it stretched before the car moved.
To make it a fair test, things we kept the same (Controlled variables)
- the car
- the same elastic bands
- and where we measured from
Conclusion: We found out that it takes more force to move the car on rougher surfaces.