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F = ma (First 10)
Dimensional Analysis
FMA-2019B-08 · 2019B F = ma (AAPT)

2019 F = ma Exam B — Question 8

A scale is calibrated so that it gives a correct reading when sitting on the ground. A person holds the scale and presses it on both sides with their hands, pushing up on the bottom with the left hand and pushing down on the top with the right. The scale has a mass of 5 kg, and their left hand exerts a force of 200 N. The reading on the scale is:
Source: Question 8, 2019 F = ma Exam B, © 2019 American Association of Physics Teachers (AAPT) and the U.S. Physics Team. Adapted by PhysicsTrainer: reformatted into a separate question and answer choices for online multiple-choice practice; any shared setup from nearby questions is repeated here. Not affiliated with or endorsed by AAPT or the U.S. Physics Team.