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To measure force, one needs a steady reference point. Absent one, nothing of consequence can be measured or inferred.
As the table slides under the laptop, the laptop cannot measure the force as it is not affected by it. This is engineering 101 people. Whip a tablecloth off a table full of dishes and they will remain still. The cups and saucer are, anthropomorphically speaking, unable to tell you anything about the force of the table cloth passing under them. Only a fully tethered laptop could measure anything of accuracy. And since virtually no one secures their laptops to anything earthly substantial, they cannot, like the plates, measure any force.
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