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• ### dimension

The manifoldness with which the fundamental units of time, length, and mass are involved in determining the units of other physical quantities.

### displacement

an objects change in position

### vector

has a magnitude and a direction

### scalar

has a magnitude, but no direction

dx/dt

### coordinate system

a system where an x and y value can locate a point

### meter/second

SI unit for velocity

### meter

SI unit for length

### velocity

a vector quantity with both magnitude and direction

### speed

a scalar quantity with only magnitude

### instantaneous velocity

the limit of the average velocity as the time interval (dt) approaches zero

dv/dt, m/s^2

### meter/second^2

SI unit for acceleration

### deceleration

negative acceleration; a decrease in velocity

### instantaneous acceleration

the limit of the average acceleration as the time interval (dt) approaches zero

### acceleration due to gravity

denoted by g; the magnitude of free-fall acceleration, which increases as altitude decreases

### motion

the movement of an object

### frame of reference

a choice of coordinate axes that defines the starting point for measuring any quantity

### resultant

a statement that solves a problem or explains how to solve the problem

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### components

something determined in relation to something that includes it

### distance

the property created by the space between two objects or points

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### parabola

a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve

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### trajectory

the path followed by an object moving through space

### relative velocity

velocity of an object with respect to a particular frame of reference

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### meter/second

SI unit for velocity

Example: