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You will need: 1. Flat surface (table) 2. Object to be dragged (wooden drawer) 3. Spring scale 4. Mass pieces (2.5kg weights) 5. Object to change surfaces in contact (towel) Here is an example of the basic setup. A video will follow of the action to be performed. This will be repeated with the mass pieces added to the box This is the basic action performed for each situation, it will be repeated with the mass pieces added to the box With the second setup a towel is added beneath the box As before the object will simply be dragged along with mass pieces added when repeated An experiment guide will be provided to give more detail on each step and the experiement in general. Thank you for watching.