# Shared Flashcard Set

## Details

Spage Physics
Physics Quiz
18
Physics
12/18/2013

Term
 What is Physics
Definition
 Study of    • Energy • Force • Motion
Term
 Motion - Definition
Definition
 Change in position of object
Term
 Motion - What is needed to describe
Definition
 • Direction • How Fast   • Location at given time
Term
 Frame of Reference - Definition
Definition
 System of objects that are not moving with respect to one another   How fast something moves is relative to the "frame of reference" chosen
Term
 Frame of Reference - What is most commonly used?
Definition
 The Earth
Term
 Relative Motion
Definition
 Motion in relation to a frame of reference   Example:  moving train • Platform as frame of reference - train moves by • Inside the train as frame of reference - people not moving
Term
 Motion Sickness
Definition
 Frame of reference and relative motion as the reason   • Eyes = you travelling at high speed   •Inner Ears = you're sitting still   Mismatch of info makes people sick Stare at horizon to calm things down
Term
 Distance
Definition
 Length of path between two points (like line segment length   SI Units = meters (m)   Large = kilometer (1 km = 1000 m) Small = centimeter (1 cm = 1/100 m)
Term
 Speed
Definition
 Ratio:  Distance to time   Speed = distance / time   Units = meters / second = m/s   Scalar measure (single number)
Term
 Average Speed
Definition
 Total distance / total time   e.g. trip to New York 300 miles 4 hours   average speed = 300 miles / 4 hours = 75 mph
Term
 Instantaneous Speed
Definition
 Speed at a given instant e.g. - Speedometer reading
Term
 Graphing Speed
Definition
 On distance vs. time plot   It is the slope of the plot   • steeper slope = faster movement • zero slope = standing still • negative slope = moving backwards
Term
 Velocity
Definition
 • Vector measurement   Speed and Direction   Change in velocity comes from change speed, direction or both
Term
 Acceleration
Definition
 Rate that velocity changes   Acceleration = change in velocity / time   SI units = (meters / second) / seconds =  meters / second2 = m/s2
Term
 Acceleration
Definition
 Change in velocity / time   Results from: • Change in speed • Change in direction • Both
Term
 Constant Acceleration
Definition
 Velocity changes constantly with time   Plot of velocity vs. time = straight line   Plot of distance vs. time = parabola (t2)
Term
 Example of constant acceleration
Definition
 Acceleration due to gravity = 9.8 m / s2
Term
 Solving For Acceleration
Definition
 Acceleragtion = change in velocity / time = (Vf - Vi) / time     Units:  (m/s) / s = m/s2   Don't forget to show work and to show units
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