51 terms

What does the straight line show on the acceleration graph?

Constant speed

What does the acceleration graph show?

Speed vs time

Can an object be accelerating even if it's speed is constant?

Yes

Means an object is not moving

Horizontal (flat line)

Where is time on a graph?

X axis (horizontal)

Where is distance on a graph?

Y axis (vertical)

Describes both speed and direction of an object's motion

Velocity

Ratio of 2 measurements

Rate

Distance an object travels per unit of time

Speed

Used to determine motion

Referenece point

When is an object in motion

When its distance from another object is changing.

What is a reference point?

a place or object used for comparison to determine if something is in motion.

An object is in motion if it changes position relative to what

a reference point

What is the whole name of SI

International Systems of Unit

what number is the SI based on?

10

What is the basic unit of length

meter

How many centimeters are there in a meter

100

how many meters are there in a kilometer

1000

what is the formula used to calculate the speed of an object?

Speed = distance / time

How would you find the average speed of a cyclist throughout the entire race

Total distance/ total time

Speed in a given direction is called

velocity

If a storm is approaching moving at 15 km/h. what do you need to know to determine its velocity?

the direction it is moving.

what is the steepness or slant of a line on a graph called

slop

what is the formula used to find the slope of a line

slope = rise / run

what is acceleration

the rate at which velocity changes

acceleration involves a change in what two components?

speed and direction

any time the speed of an object increase, the object experiences what

acceleration

What are the three things that acceleration refers to

1. increasing speed

2. decreasing speed

3. changing direction

2. decreasing speed

3. changing direction

What is deceleration another word for

negative acceleration

can an object be accelerating even if its speed is constant

yes

what is an example of acceleration

car follows a gentle curve in the road

a batter wings a bat to hit a ball

a runner slows down after finishing a race

a batter wings a bat to hit a ball

a runner slows down after finishing a race

when the moon revolves around earth at a fairly constant speed. Is the moon accelerating?

the moon is accelerating because it is constantly changing direction as it revolves around earth.

increasing speed is the same as what

speeding up

decreasing speed is the same as what

slowing down

changing direction is the same as what

turning

what must you calculate to determine the acceleration of an object?

change in velocity during each unit of time

what is the formula used to determine acceleration?

final velocity - initial velocity / time

what is true about calculating the acceleration of a moving object

if an object is moving without changing direction, then its acceleration is the change in its speed during one unit of time.

If an objects' speed changes by the same amount during each unit of time, then the acceleration of the object at any time is the same.

If an object's acceleration varies, then you can describe only average acceleration.

If an objects' speed changes by the same amount during each unit of time, then the acceleration of the object at any time is the same.

If an object's acceleration varies, then you can describe only average acceleration.

If velocity is measured in kilometers/hour and time is measured in hours what is the unit of acceleration

km/h2

If a graph of distance versus time is a straight line the graph shows what type of relationship

linear

if a graph of distance versus time is a curved line the graph shows what type of relationship

nonlinear

If the graph line is slanted and straight what does the line show about the acceleration of the object?

Accleration is constant

what happens when an object's distance from another is changing

motion

what is a place or an object used for comparison to determine if something is in motion

reference point

what is the system of measurement scientists use to communicate information clearly

SI - Internaitonal System of Units

what is the basic SI unit of lenght

meter

what is the distance an object travels in one unit of time

speed

what is speed in a given direction

velocity

the steepness, or slant of a line on a graph

slope

the major pieces of earth's crust

plates

what is the rate at which velocity changes

acceleration.