Uniform motion Objects in uniform motion travel equal

Uniform motion

Objects in uniform motion travel equal displacements in equal time intervals.

The position of the ball in this photo is shown at equal time intervals Objects in uniform motion do not speed up, slow down, or change direction.

Graphing Uniform Motion of an object can be analyzed by drawing a position-time graph. Uniform motion is represented by a STRAIGHT LINE on a position-time graph

A position-time graph plots POSITION on the vertical axis (y axis) TIME on the horizontal axis (x axis). A BEST-FIT LINE is a straight line that most closely fits the points.

Is the motion uniform?

Slope The slope of a graph refers to the steepness of the line connecting the data points

Slope To calculate slope we divide Slope= rise = y 2 – y 1 run x 2 - x 1

Positive Slope Line slants up to the right. Indicates motion in the POSITIVE direction (usually RIGHT, EAST, UP) Calculate the slope:

ZERO SLOPE Line is horizontal. Indicates that the object is STATIONARY (NOT MOVING) Calculate Slope:

NEGATIVE SLOPE Line slants down to the right. Indicates motion in the negative DIRECTION (usually LEFT, WEST, DOWN) Calculate Slope:

Describe the motion for each of the time intervals • a) 0 s – 6 s • b) 6 s – 10 s • c) 10 s – 12 s • d) 12 s – 16 s • e) 16 s – 18 s • f) 18 s – 20 s