Ch 1-3 Flashcards
Accuracy
Deals with operator error
Precision
Deals with the quality of the measuring device
Parallax
Error caused by making a measurement from too far to one side
Significant figures
Those digits in a measurement that are known with certainty, plus on (uncertain)
Dimensional analysis
Converting measurements to different units
Gram of reference
Something to compare to when describing motion
One-dimensional motion
Can move forward or backward ONLY
Displacement
The distance and direction between starting point and ending point
Average velocity
The displacement divided by the time interval
Velocity
Speed plus direction
Slope
Rise divided by run
Instantaneous velocity
The velocity of an object at some instant (or specific point in its path)
Acceleration
The rate of change of velocity
Deceleration
A special acceleration, while slowing down
Free fall
Motion of an object falling with a constant acceleration
Acceleration due to gravity
-9.81 m/s2
Scalar
A physical quantity that has only a magnitude but no direction
Vector
A physical quantity that has both magnitude, but no direction
Resultant
A vector representing the sum of two or more vectors
Triangle method of addition
Determining resultant by drawing a vector from the first tail to the last head of vectors
Tangent
Opposite/adjacent
Sine
Opposite/adjacent
Cosine
Adjacent/hypotenuse
