Motion in a straight line

acceleration

How something's speed or velocity changes over time.

no acceleration

straight line on an acceleration graph

changing speed

curved line on a distance-time graph

changing acceleration

curved line on a speed-time graph

formula for acceleration

(Final Velocity - Starting Velocity)/ time

velocity changes

When the object's speed, direction, or both change.

velocity

Speed and Direction

motion

A change in position compared to a reference point

reference point

What do we compare motion with?

speed

How fast the motion is occurring or how fast an object is changing position.

formula for speed

speed = distance / time

time

What is the x-axis (horizontal) for a speed graph?

distance

What is the y-axis (vertical) for a speed graph?

time

What is the x-axis (horizontal) for an acceleration graph?

speed or velocity

What is the y-axis (vertical) for an acceleration graph?

deceleration

Negative Acceleration, slowing down.

average speed

The total distance traveled by the total time taken

formula for average speed

Average speed = total distance / total time

object is accelerating faster

steep slope on a speed/time graph

units

What do you have to remember to put after all calculations?

constant acceleration

What does a line going up represent in an acceleration graph?

deceleration

What does a line going down represent in an acceleration graph?

change in acceleration

1. Change in speed
2. Change in direction
3. Both change in speed and direction