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Science- Chapt. 9
Terms in this set (32)
the rate at which velocity changes.
- involves a change in either speed and changing direction
- refers to increasing speed and changing direction.
an object is in motion when...
It's distance from another object is changing, if it changes position relative to a reference point.
a place or object used for comparison to determine if something is in motion
total distance/total time
speed in a given direction so if you know velocity you know both the objects speed and its direction.
steepness or slant of a line on a graph
- tells how fast one variable changes in relation to the other variable
This is the equation to calculate speed or velocity
The basic SI unit of length is this.
What is a meter?
This is the formula used to calculate acceleration.
Acc= final velocity-initial velocity
The steepness of a line on a graph is called this.
What is slope?
This is how you calculate average speed.
avg speed = total distance/total time
If the speed of an object does not change, the object is traveling at this.
What is constant speed
Changing direction is an example of this
What is acceleration?
A classroom measures 5 meters wide. Give the width in centimeters.
What is 500 cm?
The prefix -kilo means this.
What is one thousand?
A horizontal line on a distance versus time graph indicates this.
What is the object is at rest?
This is how you know if an object is in motion.
What is if its distance from another object is changing?
This is the place or object used to determine if something is in motion.
What is a reference point?
The motion of a car stopping at a red light is an example of this.
What is negative acceleration?
If a ship has an acceleration of 3 km/h/h, it's speed is expressed in this unit.
What is km/h?
You can show the motion of an object on a line graph in which you plot distance versus this.
What is time?
When you know speed and direction, you know this.
What is velocity?
If speed is measured in m/s and time is measured in seconds, the unit of acceleration is this.
What is m/s/s?
This describes what a graph would look like if an object has constant acceleration.
What is a straight slanted line?
If we say that an object is slowing down, this means that it has this type of acceleration.
What is negative?
This is what a graph would look like if an object is decelerating at a constant speed.
What is a backward straight slant?
It is rare for any motion to do this.
What is stay the same for very long?
It can be important to know the velocity of an object, not just its speed because of this.
What is velocity also tells direction?
The moon is accelerating because it is constantly does this.
What is changes direction?
If an object moves in the same direction at a constant speed for 4 hours, this did not change
What is velocity?
This type of line on a distance versus time graph indicates that the object is accelerating.
What is a curved line
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