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Checking Two Probe Tips in an Indent Test 4 questions
Checking Two Probe Tips in an Indent Test
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A display compares two polymer panels by pressing a flat probe tip against each one. In this model, pressure at the tip is the force divided by its contact area. The same material may dent under a narrow tip and stay intact under a wider tip at the same force.
| Panel | Applied force (N) | Tip area (mm2) | Permanent mark |
|---|---|---|---|
| P | 12 | 3 | Yes |
| Q | 12 | 6 | No |
Question 1
Which panel experiences more pressure in the recorded test?
- P
- Q
- Both experience the same pressure.
- No pressure acts on Q.
Question 2
A student concludes that P is less resistant to dents than Q because the applied forces match. Evaluate the comparison using the tips.
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The class repeats Q with the 6 mm2 tip. It wants the pressure to match the original P test.
Question 3
Calculate the force needed in the repeat test for Q.
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Question 4
Describe a comparison of the two materials using the same force and contact area. State one other test condition to match and what to measure after unloading.
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