8.1.1-Position & Motion Lesson

Chapter 1
Lesson 8.1.1
Position & Motion


8.PS2(3) (Tennessee Science Stds)

Chapter 1 Lesson 8.1.1-Position & Motion

Essential Questions:

1. How does the description of an object's position depend on a reference point?

2. How can you describe the position of an object in two dimensions?

3. What is the difference between distance and displacement?

​Lesson 1 Vocabulary

​Reference Point

Position

Motion

Displacement

Define Motion:

● is the change of position over time.
● When describing motion, the answer depends

on the position and motion of the person
observing you.

Example: Sitting at your desk, are you in motion?

Sitting in a car, are you in motion?

Multiple Choice

An object is _____ if its position changes.

• in motion

• at rest

• a reference point

• a frame of reference

Position:

●

Describes the LOCATION of an object.

●

Can be described using UP, DOWN, NORTH, SOUTH,

EAST, or WEST.

●

A position is compared to a REFERENCE POINT

●

A reference point is the location to which you

COMPARE another location.

Reference Points:

● Reference Points are:

○

Nonmoving points

○

Used to locate and describe the motion of an object

○

Used to describe objects to the north, south, east, or

west

○

A comparison between moving and nonmoving

○

To measure movement, the reference point must be

considered as nonmoving.

Multiple Choice

Reference point is

• moving

• non moving

• changing

• speed

​In your notes:

​In your notes:

​In your notes:

​In your notes:

Distance vs. Displacement

●

DISTANCEis the actual LENGTH
an object travels.

●

DISPLACEMENTis the
OVERALL change in POSITION.

●

Velocity has SPEED AND DIRECTION.
It changes over TIME.

●

ACCELERATION is positive
change in velocity (speed up)

●

DECELERATIONis the negative
change in velocity (slow down).

Check for Understanding

The rabbit is running from point
A to point B. The fox chases the
rabbit, and gets to a point where
it attempts to run around to
meet it at point B.

1. What is the distance the fox

travels?

2. Is the distance the same as

the displacement? Why or
why not?

Multiple Choice

Jerry walked from home to school, then from the school to the park. What is his total displacement?

• 2km

• 5km

• 8km

• 10km

Multiple Choice

Jerry walked from home to school, then from the school to the park. What is his total distance?

• 2km

• 5km

• 8km

• 10km

Multiple Choice

Billy runs 400 meters to Andy's house, turns around, and runs 400 meters back home. What is Billy's distance?

• 0

• 400m

• 800m

• 1600m

Multiple Choice

Billy runs 400 meters to Andy's house, turns around, and runs 400 meters back home. What is Billy's displacement?

• 0m

• 400m

• 800m

• 1600m

Multiple Choice

The change in an objects position from the final position to initial position.

• displacement

• distance

• motion

• reference point

Multiple Choice

Two people walk across a parking lot. Their paths are shown in the image. Who traveled with a larger displacement?

• Person A

• Person B

• They both had the same displacement

Multiple Choice

David walks 3 km north, and then turns east and walks 4 km. What is the distance?

• 7km

• 3km

• 4km

• 1km

Multiple Choice

Which of the following describes distance and displacement correctly?

• The blue arrow shows distance and the orange arrows show displacement
• The blue arrow shows displacement and the orange arrows show distance
• Both arrows show distance only
• Both arrows show distance and displacement

Multiple Choice

Jerry walked from home to school, then from the school to the park.  What is his total displacement?

• 2 km
• 5 km
• 8 km
• 10 km

Multiple Choice

Jerry walked from home to school, then from the school to the park.  What is his total distance?

• 2 km
• 5 km
• 8 km
• 10 km

Multiple Choice

What is the total distance of the object represented in this motion graph?

• 0 meters
• 300 meters
• 450 meters
• 600 meters

Multiple Choice

What is the total displacement of the object represented in this motion graph?

• 0 meters
• 300 meters
• 450 meters
• 600 meters

Multiple Choice

David walks 3 km north, and then turns east and walks 4 km. What is the distance?

• 7 km
• 3 km
• 4 km
• 1 km

Multiple Choice

Sara walks from Point A to Point B. Which is true?

• Distance and displacement are EQUAL
• Distance is less than displacement

Multiple Choice

Find the distance Sara walks from A to B,  B to C then C to D?

• 11m
• 3m
• 5m

Multiple Choice

After completing one trip on a roller coaster, the roller coaster's ________ is zero.

• displacement

• reference point

• length

• distance

Multiple Choice

Displacement is distance combined with

• direction
• speed
• velocity
• magnitude

Multiple Choice

After completing one trip on a roller coaster, the roller coaster's ________ is zero.

• displacement
• reference point
• length
• distance

Multiple Choice

The starting point you choose to describe the location, or position of an object

• Reference Point

• Distance

• Displacement

• Position

Multiple Select

When describing motion we should include which two of the following?

• Object

• Distance

• Direction

• How fluffy Mrs. Gaffney's cat is

Multiple Choice

An object's distance in a certain direction from a reference point

• reference point

• distance

• displacement

• position

Multiple Choice

Motion is:

• the starting point you choose to describe the location, or position of an object

• an object's distance in a certain direction from a reference point

• the process of changing position

• how far an object moves

Multiple Choice

Length of path between two points

• Reference Point

• Distance

• Displacement

• Position

Multiple Choice

The object's overall change in position

• Reference Point

• Distance

• Displacement

• Position

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Multiple Choice

Read the question in the image. Choose the response that best answers the question.

• a

• b

• c

• d

Poll

How do you feel about the following:

a reference point, reference direction, distance vs. displacement, and changing position?