4 Linear Motion

Do Now: Take a clicker. On loose leaf…in your own words, explain what velocity is..& brainstorm at least 3 scenarios for… - constant velocity - changing velocity HW: Finish POGIL up to # 11- you’ll get this in class today

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Do Now Continued: Trade your sheets of loose leaf with your partner for peer review in a DIFFERENT COLOR PEN. Be HONEST but respectful with your comments; use these Sentence Starters as possible starting points:- I agree with ___ because….- I am confused about ___ because….- My favorite scenario was___ because….- I disagree with ___ because….- A suggestion I can offer for improvement is…

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From now on…• No ID on your papers (HW, tests,

etc.) means -1• No Class/Period on your papers

(HW, tests, etc.) means -1 –The class is not ‘2’ or ‘science’… it

is:• 2B• Or B2

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Is speed a SCALAR or VECTOR quantity?_____________

• Is velocity a SCALAR or VECTOR quantity?_____________

2.3 Velocity

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Constant Velocity

• Constant speed means steady speed. Something with constant speed doesn’t speed up or slow down. • Constant velocity means both constant speed and constant direction. • Constant direction is a straight line, so constant velocity means motion in a straight line at constant speed.

2.3 Velocity

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• Answer the rest of the questions in your Concept Attainment

• Work efficiently! Work efficiently!

• You have 5 minutes – then You have 5 minutes – then we are clicker reviewing! we are clicker reviewing!

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Fill this in on notes:

Constant Velocity Changing Velocity To have constant velocity requires BOTH constant

__________________________

and constant

__________________________.

If EITHER the

__________________________

or

__________________________

(or both) is changing, then the velocity is changing.

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Fill this in on notes:

Constant Velocity Changing Velocity To have constant velocity requires BOTH constant

__________________________

and constant

__________________________.

If EITHER the

__________________________

or

__________________________

(or both) is changing, then the velocity is changing.

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1. Please list a scenario in which someone/ something’s velocity is CONSTANT:

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2. Please list a scenario in which someone/ something’s

velocity is CHANGING:

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3. Why is the gauge in a car is called a speedometer and not

a velocitometer? EXPLAIN

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4a. This car’s cruise control is set for 50 km/h. It drives in a circle. Does it have a constant speed? EXPLAIN:

1 2 3

0% 0%0%

1. Yes

2. No

3. Not quite sure

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4b. This car’s cruise control is set for 50 km/h. It drives in a circle. Does it have a constant velocity? EXPLAIN:

1 2 3

0% 0%0%

1. Yes

2. No

3. Not quite sure

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5a. The speedometer of a car moving northward reads 60 km/h. It passes another car that travels 60 km/h southward. Do the cars have the same speed? EXPLAIN:

1 2 3

0% 0%0%

1. Yes

2. No

3. Not quite sure

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5b. The speedometer of a car moving northward reads 60 km/h. It passes another car that travels 60 km/h southward. Do the cars have the same velocity? EXPLAIN:

1 2 3

0% 0%0%

1. Yes

2. No

3. Not quite sure

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POGIL• Alternative to lecture

• MUST WORK in groups of 2-5, no more/less

• May work at lab benches

• Not on task = work by yourself in front of class

• CHECK IN AT STOP SIGNS!

• Stopping with 5 minutes left for an exit

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You walk 2m north,4 m east, 2 m south, and 2 m left. What is your total DISTANCE covered?

1 2 3 4 5 6

0% 0% 0%0%0%0%

1. 2 m

2. 2 m to the right

3. 10 m

4. 10 m to the right

5. None of the above

6. Not sure

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You walk 2m north,4 m east, 2 m south, and 2 m left; it takes you 2 seconds. What is your average SPEED?

1 2 3 4 5 6

0% 0% 0%0%0%0%

1. 1 m/s

2. 1 m/s to the right

3. 5 m/s

4. 5 m/s to the right

5. None of the above

6. Not sure

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You walk 2m north,4 m east, 2 m south, and 2 m left. What is your total DISPLACEMENT?

1 2 3 4 5 6

0% 0% 0%0%0%0%

1. 2 m

2. 2 m to the right

3. 10 m

4. 10 m to the right

5. None of the above

6. Not sure

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You walk 2m north,4 m east, 2 m south, and 2 m left; it takes you 2 seconds. What is your average VELOCITY?

1 2 3 4 5 6

0% 0% 0%0%0%0%

1. 1 m/s

2. 1 m/s to the right

3. 5 m/s

4. 5 m/s to the right

5. None of the above

6. Not sure

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HW

• You must finish up to the last Stop Sign for HW (#11)– You do not have to complete the last page of

Additional Practice tonight – We will finish that last page (Additional

Practice) at a later date