Unit 6
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Frame of Referance
background used to describe the motion of an object
Reference Point
the specific point used to determine your position
Why should reference frame/point be defined?
So they are the same between witnesses and motion can be described in the same manner/accurately
Scaler
Quantity that just includes magnitude (numerical value) SPEED
Examples of Scalar quantities
Speed Distance Temperature 5m/s
Vector
Quantity that includes magnitude and direction VELOCITY
Examples of Vector quantities
Displacement Velocity Acceleration -3m/s 2m/s northeast
Distance
total length traveled SPEED
Displacement
Distance from the starting point VELOCITY
When will displacement and distance be the same?
When the object is only moving in one direction/doesn’t change direction
Speed
Distance/Time how fast objects are moving
Velocity
Displacement/Time speed in a given direction -positive/negative, forward/backward
Difference in units for speed and velocity
S : 3m/s V: -3m/s (or north or some kind of direction)
When is displacement zero?
When an object stops at the same place it started
Acceleration
Velocity/Time Vector quantity Speeding up/slowing down
Acceleration and Velocity in same direction
Speeding up
Acceleration and Velocity in opposite direction
Slowing down
:)
GRAPH STUDY SHEET
Slope of a position-time graph
Velocity
Slope of velocity-time graph
Acceleration
Y-Intercept of a position-time graph
Initial position
Use trig to find displacement
a2 + b2 = c2 for length soh cah toa for degree measure in direction
Displacement of an object must be _____ the total distance the object travels
less than or equal to