Friction

We are learning about friction. We know friction is created when 2 things rub together. 

Caitlyn and Neesha rubbing their hands together.
They felt smooth but as they rubbed faster heat was created.
Friction creates heat.  

Bowen rubbing his hands together with salt on his hands.
As you can see it is hard to rub our hands together because
the salt makes it rough.

George is explaining that the salt makes more friction
while he rubs his hands together with some difficulty.

Bailey has liquid soap on her hands and this has made her hands
slippery. There is less friction.

We had ramps that had different friction on them. We predicted what will happen when we run the cars down the different ramps.

We are learning to carry out fair tests. 

A fair test means everything needs to stay the same except for the one thing you are testing. 

We were carrying out an experiment about friction.

We could only change the friction on the ramps so the car, the height of the ramp and where we carried out our experiment had to stay the same. 

After testing all the different ramps we worked out the less friction the faster and further the car travels. The tinfoil ramps car traveled the most distance and the sand ramp traveled the least distance. 

We talked about why friction is important in many things we do everyday. 

When does friction help you?