Objectives Investigate friction Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner.

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Presentation transcript:

Objectives Investigate friction Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.

Newton’s 3rd Law of Motion: Every force has an equal and opposite force. Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.

What is happening in this picture? Which forces are in action here? What steps are taken to reduce them? Justify the 3 rd Law of Motion. Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.

1. Select a shoe to use – ideally one with laces. 2. Start with a dry surface. 3. Hook the Newton meter onto the shoelaces. 4. Pull the shoe along the surface and record the amount of force needed in the results table. 5. Change the amount of mass inside the shoe and repeat. 6. Continue up to 1000g. 7. Repeat the experiment for a wet or lubricated surface. 8. Some of you will work quick enough to obtain 2 sets of results for each surface. In this case, you need to calculate an average result. Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.

You now need to plot a line graph of your results. Mass in grams along the bottom. Force in Newton's up the side. Plot the results for the 2 different surfaces on the same graph using a different colour for each line. Remember to label the axis and give the graph a title. Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.

Conclusion Were there any anomalous (dodgy looking) results that did not fit on the line? Can you explain them? Which surface had the biggest friction? What happens to the amount of friction as the mass inside the shoe gets bigger? Was this experiment a fair test? How did you make it a fair test or not? Could you improve or modify this experiment and if so how? Outcomes (5) Carry out an investigation obtaining a full set of results. (6) Present those results in a suitable manner. (7) Fully analyse those results using scientific terminology and understanding. Key terms: friction, motion, oppose, force, Newton, meter.