Final Exam Review Flashcards
o 7 base units
o Other derived units
• SI system/metric system
o How exact a measurement can be
o Depends on the instrument and the technique
• Precision
• Precision of an instrument
o (1/2) the smallest division of the instrument
Precision is measured with
standard deviation
o How well a measurement agrees with “real” or “known” values
• Accuracy
Independent variable
x values
Dependent variable
y values
• Requirements for a graph
o Title must mention the independent and dependent variable
o How “X Variable” Impacts “Y Variable”
o “Y Variable” vs “X Variable”
o Series of images showing positions of a moving object at equal time intervals
• Motion diagram
o Object is replaced by a series of single points
• Particle Model
o Quantity with magnitude but no direction
Scalar
o Quantity with magnitude and direction
Vector
o Difference between two times
• Time Interval
o Difference between two positions
• Displacement
o An idea, equation, structure or system that can predict physical phenomenon
• Scientific Model
o Proposed explanation for a set of observations; not much evidence behind it yet
• Scientific Hypothesis
o Rule or descriptions of a pattern in nature
• Scientific Law
o Explanation that Is backed up by many, many separate experiments
• Scientific Theory
Percent Error
(abs(known value- measured value))/known value
o A graph that plots the time data on the horizontal axis and the position data on the vertical axis
• Position time graph
o Slope of a position time graph
• Velocity
o Absolute value of velocity
• Speed
• Instantaneous velocity
o Speed and direction of an object at a particular instant
o Find the slope of the tangent line to that point on a position time graph
(solving the first derivative of the position function at a given time)
o Motion due to gravity alone (ignoring air resistance)
• Free fall
