A person standing on a weighing scale sees a reading on the scale as 148 pounds. This person is acted on by

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Solution

Newton's law of Motion
Newton's third law of motion states that there is an equal and opposite reaction for every action.
Explanation for the situation.
Newton’s third law refers to forces that are equal in magnitude and opposite in direction acting on a body.
From the given, a person standing on a weighing scale.
According to the third law of motion, the gravitational force is acting in the downward direction. As a result, it is being acted upon by an equal and opposing force, which is known as normal reaction.
Therefore, two forces of equal magnitude are acting in opposite directions.
Hence, a person is acted on by two forces of equal magnitude in opposite directions.

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