Using a Motion Sensor,Sean Finds That the Acceleration of a 2-Kg

question 11

Multiple Choice

Using a motion sensor,Sean finds that the acceleration of a 2-kg rock that has been dropped from the roof of a building is 5.5 m/s².He concludes that the magnitude of force of air resistance acting on the rock is approximately

• A)19.6 N
• B)11.0 N
• C)9.81 N
• D)6.62 N
• E)None of these is correct.

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Definitions:

Science

The disciplined pursuit of knowledge, understanding, and truth through experimental observation, empirical evidence, and theoretical explanation.

Experience

Practical interaction with the world and the knowledge we gain through it. Today the term science tends to be limited to those questions that can and must be answered by reference to experience and extrapolations from experience.

Extrapolations

Predictions or inferences about unknown data made based on known or observed information.

Rational

In accordance with the rules of effective thought concerning coherence, consistency, practicability, simplicity, comprehensiveness, looking at the evidence and weighing it carefully, not jumping to conclusions, and so on. Rationality may not guarantee truth; all the evidence and everything we believe may point to one conclusion, and yet later generations, who know things that we do not, may see that our conclusion was incorrect. It was rational thousands of years ago to believe that the earth was flat, even though it was not true. It is not rational for us to believe the same thing, for our evidence and all sorts of other beliefs indicate, rather, that it is rational to believe that the earth is (more or less) spherical.