Physics Textbook - Grade 11

Kinematics

Describes the study of how objects move

Motion

Change in the location of an object, measured by an observer

Distance

Total length travelled by an object in motion (in metres)

How do you determine position, using a PTG?

Read information from a graph

Direction

Line an object moves along from a particular starting point

Scalar Quantity

Only has magnitude (size)

Vector Quanitty:

Has magnitude + direction ( An arrow is placed over the variable when it reps. a vector quanitity)

Position:

Distance & Direction of an object from a particular reference point (vector quantity)

Displacement

he change in position of an object, considering both the distance and direction of the movement (vector)

Average Speed

total distance travalled divided by total time taken to travel that distance

Average velocity

the total displacement or change in position, divided by the total time for that displacement

Motion w Uniform/Constant Velocity

Motion of an object is at a constant speed in a straight line

Motion w Non-Uniform Velocity

Motion in which an objects speed changes or the object does not travel in a straight line

Position-Time Graph

Displays motion graphically, the slope is the velocity

How do you determine velocity from a PTG

Take the slope

How do you determine velocity from a VTG

read information from graph

How do you determine velocity from ATG

Find the area

How do you determine acceleration from VTG

Take the slope

How do you determine acceleration from ATG

Read information from the graph

The area under the ATG….

Gives the velocity of the object

Acceleration-Time Graph

A graph describing the motion of an object with acceleration on the vertical axis and time on the horizontal axis

Tangent

a line that touches a curve at a single point without crossing it