#3 in Industrial scales
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Reddit mentions of Ajax Scientific ME505-5000 Plastic Tubular Spring Scale, 5000g/50N Weight Capacity, Yellow
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Reddit mentions: 1
We found 1 Reddit mentions of Ajax Scientific ME505-5000 Plastic Tubular Spring Scale, 5000g/50N Weight Capacity, Yellow. Here are the top ones.
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Tubular spring scaleThis spring scale have a clear plastic body that is calibrated in both grams and newtonBoth rings and hooks are chrome-plated and each can be zeroed with the metal nut located at the topDimensions of scale (excluding ring and hook) are approximately 18-centimeters long by 2-centimeters diameterAvailable in yellow color
Specs:
| Color | Yellow |
| Height | 1 Inches |
| Length | 10 Inches |
| Number of items | 1 |
| Weight | 0.1 Pounds |
| Width | 1.3 Inches |
You will see two kinds of friction: rolling (in the bearings and squishing the wheel), and if you're going sideways, sliding (static before moving, and dynamic afterwards). In either case, experiment is probably the right way to answers.
You could just get a spring scale like this, (check the supermarket?) and some weights (milk jugs with water, or several different friends).
Weight the board and pull with scale, measuring the pull force. Plot a graph of weight vs pull force. Repeat for each type of surface.