How Weight Affects Friction.

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Planning:

The three factors that affect friction between surfaces are:

Weight (Mass)

Surface type (Roughness)

Area of Contact

I will investigate how weight affects friction.

I will keep the other factors constant to make it a fair test.

Trial Experiment

I will choose the 100g masses.

I will choose the 95g sled.

I will take 5 numbers of readings.

My range will be from 0g to 1kg.

I will repeat each reading by 2 times.

Reasons

I chose to use the 100g masses because they are easy to read and covers the required range.

I chose the 95g sled because the sled could hold more weight than the 31g sled, it is easier to read and easier to plot.

I chose to take 5 numbers of readings because it fits with my range. I will go up by 200g for each reading.

I chose to use my range from 0g to 1kg because it is easy to read.

I will repeat each reading 3 times, I will repeat readings and take average so that it will be a fair test.

Trial