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science test 12/15

studystack for science

QuestionAnswer
An object is in motion if it changes position relative to a reference point
What is a good reference point objects that are fixed relative to earth such as a building, a tree, or a sign makes a good reference point
distance the length of the path between two points
reference point A place or object used for comparison to determine if an object is in motion
motion The state in which one objects distance from another is changing
speed the distance an object travels per unit of time
what is speed speed is a type of rate. A rate tells you the amount of something that occurs or changes in one unit of time.
speed equation distance/time
distance equation speed x time
time equation distance/speed
average speed equation total distance/total time
instantaneous speed the speed at which an object is moving at a given instant in time
velocity speed in a given direction
slope the steepness of a line on a graph
slope equation rise/run
acceleration the rate at which velocity changes
in science, acceleration refers to increasing speed, decreasing speed, or changing direction
acceleration equation final speed-initial speed/time
si unit of acceleration m/s^2
Even an object that is traveling at a (. ) can be accelerating. Recall that acceleration can be change in direction as well as change in speed. Constant speed
To convert hours-mins-secs Multiply each by 60
To covert secs-mins-hours Divide each by 60
To convert from km-m Multiply each by 1000
To convert from m-km Divide each by 1000
Explain what a reference point is used for It is used for comparison to determine if something is moving as the distance changes
What three kinds of changes in motion are called acceleration Increasing speed, decreasing speed and changing direction
Make sure you can Do unit conversions and calculate distance speed velocity and acceleration
The SI unit for measuring distance is the Meter
There are 1000 m in a Kilometer
An object is in ( )if its position changes relative to another object Motion
A ( ) is a place or object used for comparison to determine if something is in motion Reference point
(. )Is the length of the path between two points Distance
On a graph showing distance versus time a horizontal line represents an object that is Not moving
If two lines appear on the same motion graph the line with the steeper () indicates a greater speed Slope
Two objects traveling at the same speed, have different velocities if they Are going in different directions
The rate at which velocity changes is Acceleration
Created by: emilybinderiya
 

 



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