1. 11.1 Distance and Displacement
Frame of reference: object used to describe motion
Relative motion: movement in relation to frame of reference
Measuring Distance: length of path between 2 points
Measuring Displacement: direction (using straight line) from starting to ending point

2. Displacement Straight path Not straight path
Same direction add magnitudes
Opposite direction subtract magnitudes
Not straight path
Resultant vector (if multiple directions) gives vector sum, like a graph

3. 11.2 Speed and Velocity Speed (v)= distance (d) / time (t)
Avg: duration of trip
Instantaneous: particular instant
Graphing Motion
Slope of the line= speed

4. Velocity Combining velocities Both speed and direction It’s a vector
Add together like vector addition

5. 11.3 Acceleration Acceleration: change in speed, direction, or both
Changes in Speed
Speeding up and slowing down are acceleration
Freefall: move of object towards earth because of gravity (9.8m/s2)
Changes in Direction
Speed can be constant but change in direction
Ex rides that spin
Changes in Speed and Direction
Ex roller coaster

6. Constant acceleration: steady change in velocity, ex: jet
Calculating Acceleration: Change in velocity/ total time; a= (vf – vi) / t
Speed-Time Graphs: linear
Distance-Time Graphs: nonlinear
Instantaneous Acceleration: how fast velocity is changing at specific acceleration