student drove to the university from her home and noted that the odometer reading of her car increased by 12.0 km. The trip took 18.0 min. (a) What was her average speed? (b) If the straight-line distance from her home to the university is 10.3 km in a direction 25.0º south of east, what was her average velocity? (c) If she returned home by the same path 7 h 30 min after she left, what were her average speed and velocity for the entire trip?

Kinematics Position, Distance, and Displacement ● Before describing motion ○ Set up a coordinate system, define an origin and positive direction, define position ● Position: where ● Distance: total of how far you go ● Displacement: change in position = Δp ○ Displacement to the right is positive, displacement to the left is negative ○ Δp = 2 ○ Distance = 10 Average Speed and Velocity ● Average speed = elapsed time displacement ● Average velocity = elapsed time