Physics ( 1 )

Describing Motion and Acceleration

Acceleration

The rate at which velocity changes

Average acceleration

Change in velocity divided by the time interval over which it changed

Instantaneous acceleration

Rate of change of velocity at a specific instant in time

Speed

Rate at which an object changes its location

Average speed

Distance traveled divided by time in which the motion occurs

Instantaneous speed

Speed at a specific instant in time

Velocity

The speed and direction of an object

Average velocity

Displacement divided by time over which displacement occurs

Instantaneous velocity

Velocity at a specific instant in time

Reference frame

A coordinate system in which the positions of objects is described

Position

The location of an object at any particular time

Kinematics

The study of motion without considering its causes

Dependent variable

The variable that changes as the independent variable changes

Independent variable

The variable that does not change based on other things ( horizontal axis )

Distance

The length of the path actually traveled between an initial and a final position

Displacement

The change in position of an object against a fixed axis

Magnitude

Amount / size

Scalar

A quantity that has magnitude but no direction

Vector

A quantity that has both magnitude and direction

Gravity acceleration

Force of gravity, 9.80 m/s2

Constant / uniform acceleration

Acceleration that does not change with respect to time

Kinematic equations

The five equations that describe constant acceleration motion in terms of time, displacement, velocity, and acceleration

Negative acceleration

A component of acceleration in the negative direction of the axis

Slope

The steepness and direction of a line

v (vf)

Final velocity

u

Initial velocity

a

Acceleration

t

Time

s

Displacement, △x

x

Position