Chap 1 - Concepts of Motion Flashcards
The location of an object in relation to some “reference point”
Position
The symbol for time
t
In linear motion, the “+” and the “-“ symbols are used to show what?
Direction
Acceleration
That rate at which you change your velocity.
Example:
Every second, he was going 5mph faster than the second before.
A quantity that has both magnitude and direction.
Example:
Forces are vectors because if you push or pull on something, there is a magnitude (size) of your push, and there is always a direction of your push.
Vector
Velocity at clock reading = t
<span>v</span>t
A point or exact location that can be used to help describe the location of some other point or object.
Reference Point
Constant Speed
Not speeding up or slowing down
A letter written smaller and below the rest of the writing.
<span>v</span>t
Here the “ t “ is subscripted
Subscript
Another way of saying that someone is accelerating in such a fashion that each second they were going 7 meters per second faster than the second before?
Acceleration = (7 m/s) / s
or
7m/s2
In motion along a line, what is the difference between the following two “velocities?”
17 m/s
-17 m/s
The objects are traveling at the same speed, but in opposite directions.
In linear motion, we can use plus and minus to represent different directions.
Reference Point
A point or exact location that can be used to help describe the location of some other point or object.
This is called a
Motion Diagram
(aka Motion Map)
Scaler
A quantity that has a magnitude (size) but no direction.
Examples:
Temperature. 78 degrees tells you how “big” the temperature is, but there is no direction to 78 degrees.
In order to describe the position of an object, you must always refer to a ___________ _____________.
Reference Point
(or reference object)
Speed
How fast an object is traveling.
(Direction is not important)
Average Speed
A single speed that can be used to represent an object’s speed during a period of time, even if the object is changing speeds.
Is velocity a vector or a scaler?
Velocity is a vector.
It has both magnitude (size) AND direction.
Example:
Her velocity was 30 mph north.
Which object is moving faster?
A car going +10 mph
A moped going - 10 mph
Neither.
They are both going the same speed, but in different directions.
<span>x</span>0
Position at clock reading = zero
x
the symbol for position
(X marks the spot)
Velocity/Time graph
A motion graph with time on the horizontal axis and velocity on the vertical axis.
a
The symbol for acceleration
Vector
A quantity that has both magnitude and direction.
Example:
Forces are vectors because if you push or pull on something, there is a magnitude (size) of your push, and there is always a direction of your push.
Position at clock reading = “t”
<span>x</span>t
<span>v</span>t
Velocity at clock reading = t
Displacement
How far you are from where you started, and in what direction.
Which object is moving the fastest?
A
The steepest line on a position/time graph represent the fastest moving object.
(A is moving the opposite direction from B and D)
Which object is not moving?
C
