The figure represents the velocity of a particle as it travels along the x-axis. At what value (or values) of t is the instantaneous acceleration equal to zero? 
Definitions:
Phenomenology
A philosophical approach that emphasizes the study of conscious experience from the first-person point of view.
Scientific Hypothesis
A proposed explanation for a phenomenon, which can be tested through experimentation and observation.
Empirically Tested
The process of verifying theories or hypotheses through direct observation and experiment, grounded in factual evidence and scientific method.
Variables
Are elements, traits, or conditions that can change or vary within an experiment or study, potentially influencing the results.
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