An object is in motion when its distance from another object is changing.
What is Newton's first law of motion?
an object at rest will remain at rest, and an object that is moving at constant velocity will continue moving at constant velocity, unless acted upon by an unb
What is a conversion factor?
A ratio between two different units that is equal to one.
Why is scientific notation useful?
You can express very large or very small numbers without a bunch of zeroes
What is a force?
A force is a push or a pull
The amount of inertia an object has depends on its ________
Mass
What system do most scientists use?
International System
What three things does acceleration refer to?
Increasing speed, decreasing speed, changing direction
How are forces described?
By their magnitude and the direction in which they act
When do you know an object's velocity?
When you know the speed and the direction of an object’s motion, you know its velocity
When are forces considered unbalanced?
When there is a net force acting on the object
When do you use average speed?
When you cannot use one speed to describe the object's speed for the whole time
What is inertia?
The tendency of an object to resist change in its motion
What two things are needed to add or subtract units in scientific notation?
The same units and the same powers of ten
Put the following into scientific notation: 65493884
6.5 X 10^7
648g= _____kg
6.48
What is a reference point?
A reference point is a place or object that is used for comparison to determine if something is in motion. An object is in motion if it changes position relativ
How can you show the motion of an object?
Using a line graph
What is physical science?
The study of nature and the behavior of the physical world.
SI units are all multiples of
10
How do you determine acceleration of an object?
You must calculate the change of velocity during each unit of time.
What is the speed of an object?
The speed of an object is the distance an object travels in one unit of time.
83mL=____L
0.083
How do you find an object's slope?
rise/run y2-y1/x2-x1
How does the average speed of the Earth's plates help scientists?
It helps them explain how Earth's surface has changed over time
Put the following into scientific notation: 0.000872
8.7 X 10^-4
When two forces act in opposite directions they combine by __________
Subtraction
What is a vector?
A quantity that has both magnitude and direction
Put the following into scientific notation: 4253678
4.3 X 10^6
What is acceleration?
The rate at which velocity changes
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