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Physics Help??? One Question :S?

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Physics Help??? One Question :S?

Postby rhys » Mon Dec 12, 2011 2:01 pm

John studied the motion of a pendulum. He used the same length of pendulum string, but two different masses. He measured the period of the pendulum with the same angle of displacement. In 100 trials, regardless of the mass, the period was the same, 1 percent. John concluded that the period of a pendulum swing is not dependent on the mass.

In the scenario described, how did John determine his conclusion about the period of the pendulum's motion?

deductive reasoning from a valid principle

inductive reasoning

deductive reasoning from an invalid principle

circular logic
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Physics Help??? One Question :S?

Postby earie » Mon Dec 12, 2011 2:11 pm

As John is making a generalized conclusion for all masses based on period observations of only two mass variables, he is using inductive reasoning.

Based on his high degree of repeatability over many trials he might use deductive reasoning to make a statement that a pendulum of a certain mass and certain length will have a predictable period.
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