Scalar

-A quantity that describes mesurement.

Example: 

5cm, 2in, 50km/h...etc.

Vector

-A quantity or mesurement in which direction is included.

Example: 5cm[North], 3in[-->], etc..

Distance

-Total amount travelled

Example:

[image]

Position

-How far away an object is relative to its origin departure point.

Example：

Time Interval

-Difference between the initial time and the final time.

Example:

It's like the space between two point(just change the points to "time")

Displacement

-The Straight-line distance and direction from one point to another.

Example:

A person walked 10km north and 5 km south, the distance he walked was 15km but the displacement was 5km[N]

Uniform Motion

-Also known as linear relation(straight line)

-An object travels equal distance in equal amount of time.

-There's no absolute uniform motion in reality.

Example:

[image]

Slope

-The line in the graph

-represented the velocity in the position-time graph.

-represented the acceleration in the velocity-time graph.

Velocity

-A vector that is speed with a direction.

Example:

5km/h[N], 7m/s[S]

Acceleration

-acceleration is the rate of change of velocity with time.

a=Δv/Δt

Initial/Final Time

-initial time: the time that an object began to move.

-Final time: the time that an object stop moving.

-The amount of the time between initial and final time called the time interval

Example:

Position-time Graph

-A graph that shows the relationship between the displacement and the time.

Example:

[image]

Velocity-time Graph

-the graph that shows the relationship between the velocity and the time.

-the slope of the velocity-time graph is the acceleration.

Example:

[image]