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# Motion1

### Motion, speed, velocity, acceleration

Change in position relative to a reference point. motion
A stationary object used for comparison to determine if an object is in motion. reference point
SI unit of length meter
Number of centimeters in one meter 100
Number of meters in one kilometer 1000
The distance traveled in a certain amount of time speed
Total distance divided by total time average speed
Speed in a given direction velocity
Rise divided by run slope
The rate at which velocity changes acceleration
Increasing speed, decreasing speed,or changing direction acceleration
For an object moving in a straight line, the change in speed per unit of time acceleration
Both velocity and acceleration include ______________ of an object's motion direction
For zero distance, speed is zero
For zero speed, motion is zero
For zero acceleration, speed does not change
The steepness of a line on a graph slope
When an object's distance from another object is changing it it in motion
Speed equals distance divided by time
When you know both the speed and direction of an object's motion you know the velocity
If the speed of an object does NOT change the object is traveling at a constant speed
If an object moves in the same direction and at a constant speed _____ did not change. velocity
Example of deceleration is a car approaching a red light
Riding a ferris wheel is acceleration because ___________ is changing direction
SI unit of speed m/s
SI unit of acceleration meter per second per second
Created by: CMoody