2.2

"What is a coordinate system?

"A coordinate system gives the location of the zero point of the variable you are studying and the direction in which the values of the variable increase"

"How are time intervals measured? "

"A time interval is the difference between two times.

"How does the chosen coordinate system affect the sign of objects' position? "

"A vector drawn from the origin of a coordinate system to an object indicates the object's position in that coordinate system. The directions chosen as positive and negative on the coordinate system determine whether the objects' positions are positive or negative in the coordinate system.

What is displacement?

"Change in position is displacement, which has both magnitude and direction.

"How are motion diagrams helpful in answering questions about an object's position or displacement?

"On a motion diagram, the displacement vector's length represents how far the object was displaced. The vector points in the direction of the displacement, from xi to xf .

Displacement

A change in position having both magnitude and direction is equal to the final position minus the initial position

Magnitude

A measure of size

Vector

A quantity such as position that has both magnitude and direction

Scaler

A quantity such as temperature or distance that is just a number without any direction

Coordinate system

A system used to describe motion that gives zero point loacation of the variable being studied and the direction in which the values of the variable increase

Resultant

A vector that represents the sum of the two other vectors it always points from the first vectors tail to the last vectors tip

Time interval

The difference between two times

Position

The distance and direction from the origin to an object

Distance

The entire length of an objects path even if the object moves in many directions

Origin

The point at which both variables in a coordinate system have the value zero