Friction on two surfaces: watch the stopping position

Use the same lightweight slider across two secured surfaces. A difference in stopping position becomes worth discussing when the starting procedure is comparable; changing the object or giving it a different push introduces another question.

A textured mat may stop the slider sooner in these trials.

Check that the surface samples remain in place. A slipping sample changes the setup and makes the comparison harder to interpret.

Secure the sample before repeating

Set a consistent start. Try each surface repeatedly. Compare stopping positions.

Were the starting conditions alike? Use a short reachable track.

Avoid claiming one result applies to every material.

Resources

• Paper aircraft test – Forces and Flight Major Activity — Use the aircraft investigation for a follow-up comparison with a recorded procedure.

Further reading

• CSIRO — inquiry and explicit teaching

Read next

• A low ramp test with a consistent release
• An unexpected result belongs in the investigation log
• Find the moving part in a sound-making object

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