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Notes on Chapters 1 and 2

Notes on Chapters 1 and 2 - higher speed(magnitude...

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Notes on Chapters 1 and 2 16/01/2008 13:06:00 Scientific method Observation “recognize a problem” Develop hypothesis “make educated guess” o Scientific hypothesis must be testable Predict consequences of hypothesis Test hypothesis with experiments Form general rule that organizes o Hypothesis, prediction, outcome into a theory This is a guide, but sometimes it’s all about trial and error Advances in Science o Observation – what do you see? o Generalization/discussion o Hypothesis – how do you explain this? o Theory – how do you test this? Penny demo was pretty funny Describing Motion Speed = distance traveled in interval of time o Value without direction Average speed = total distance traveled in a trip over total time Instantaneous speed = the speed at one spot Direction is important o Velocity is a VECTOR QUANITITY

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o Velocity accounts for direction Slope of graphs Larger distance/time

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Unformatted text preview: higher speed (magnitude) Constantly decreasing slope (convex) in position means constant SLOWING of speed (slope) Position -> speed -> acceleration. Scalar = Speed, Vector = Velocity o Other Scalar: Mass, quantities… stuff that doesn’t need direction • Vectors o Addition of vectors (summing after you draw the directions) o Subtraction of vectors. o Other shit • Acceleration = rate of change in velocity over time o Forces associated with acceleration. o Instantaneous acceleration calculated by taking short time interval where acceleration doesn’t change much. o Direction of acceleration Deceleration vs. acceleration. o When velocity is constant, acceleration is 0. The reason that coke doesn’t spill all over you when you pour it in a cup on a train going 100 miles an hour 16/01/2008 13:06:00 16/01/2008 13:06:00...
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Notes on Chapters 1 and 2 - higher speed(magnitude...

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