Motion 1 Vocabulary

Position

the distance and direction that an object is from a reference point

Reference Point

an object or place you use to describe the locations of other objects

Reference Point

5 meters

Speed

the rate that describes how far an object moves over time

40m/5s=

8m/s

10m/5s=

2m/s

A person walks

30 km in 5 hours. Find the speed.

30km �5h

=6km/h

A dog runs 24 meters in 6 seconds. Find the speed.

24m �6s

=4 m/s

Velocity

an object’s speed and direction of motion

Example: 8 m/s east

Speed how fast you are travelling

Velocity “speed in a given direction”

Reference Frame

a point of view on the speed and direction that objects are moving and what reference point they are moving relative to

Example

A

B

Whether or not you are moving depends on your point-of-view

I am standing still

Wait! Hold still!

For the next 3 slides assume there are 2 people in the cart, Person A and B

C

A

B

From the reference frame of C, what way is the car going?

C

A

B

From the reference frame of A, is

person B moving?

C

A

B

From the reference frame of A, is person C moving?

C

A

B

https://mashable.com/video/aye-aye-lemur-denver-zoo/#bzXuDuEyuuqD

Acceleration

• the rate of change of an object’s velocity; �acceleration can be:

• speeding up

​

• slowing down

​

• or changing direction

​

Decide which is:

changing direction

slowing down

speeding up

I’m accelerating because I’m speeding up.

I’m accelerating because I’m slowing down.

I’m accelerating because I’m changing direction

Chromebooks- open TCI

Complete #7 and 8 on your notes�Purple Sidebar= click Vocabulary Cards, then Vocabulary Deck Make sure it is on Lesson 1.�Find the next 2 words and fill out their definitions (criteria, constraint)�On the bottom to the right it will say “next Card”�Find the word, then click “flip card”

Criteria

the requirements that must be met for an engineering solution to be successful

Example: A life vest has to hold air and float.

Constraint

Time, weather, $

limitations on an engineering solution

Criteria or Constraint

1.You can only spend 1 million dollars

2.The project must be 7 stories high

3.The project must be earthquake safe

4.The project should be completed in 1 year

Constraint

Criteria

Criteria

Constraint

Cart and Paperclip Model

With your lab group: Your criteria are that your model shows that a colored paperclip is:

• 1. stationary when viewed from the reference frame of another paperclip
• 2. stationary when viewed from the reference frame of the cart
• 3. moving in the positive direction away from you, from your reference frame.�

1. Once you have a model that meets all three criteria and is approved by your teacher, draw your model in your notes

2. Label the letter 1, 2, 3 to show where the reference frame is on your drawing.

Khan Academy - Reference Frame Video

The End

Not in TCI anymore