negative acceleration: braking your automobile. date: sept 19, 2011 hw:ptg pg. 88, #1-4, due fri do...

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CHAPTER 1, SECTION 5 Negative Acceleration: Braking Your Automobile

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Page 1: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

CHAPTER 1, SECTION 5Negative Acceleration: Braking Your Automobile

Page 2: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Date: Sept 19, 2011HW: PTG pg. 88, #1-4, Due Fri

Do Now (NB pg ?): WDYS WDYT

TB pg. 75 Read Investigate #1-4

TB pg. 76-77

Agenda: Do Now Objective & Success Criteria Investigate Physics Talk Quiz 1.5 PTG

Learning Objective: Understand how negative acceleration relates to braking and stopping distance

Success Criteria: Plan and carry out an

experiment to relate braking distance to initial speed

Determine braking distance Examine accelerated

motion

Page 3: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Investigate:

Complete #1-3 with your group Check procedures with Mr. Spencer Create data table Check with Mr. Spencer Complete #4

Page 4: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Sept 20, 2011HW:PTG pg. 88, #1-4, Due Fri

Finish procedures and data table Set up and collect data

Remember you are measuring the SPEED at the bottom of the ramp and BRAKING distance in METERS!

Analyze Data Average speed AND distance for EACH

height

Page 5: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

September 21, 2011HW:PTG pg. 88, #1-4, Due Fri

Do Now: Find Averages Complete #5 a ,b on pg.

77 One group member draw

your graph on the board Complete #5c-e

Agenda: Do Now Investigate 5-8 Physics Talk

Checking up Quiz

Learning Objective: Understand how negative acceleration relates to braking and stopping distance

Success Criteria: Plan and carry out an

experiment to relate braking distance to initial speed

Determine braking distance Examine accelerated

motion

Page 6: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Investigate #5-8

As a class

Page 7: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Physics Talk

What is negative acceleration?

Draw an example of negative acceleration

Change in velocity with respect to time by decreasing speed in the positive direction or increasing speed in the negative direction

Page 8: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Physics Talk

How do you calculate braking distance?

Vi2=-2ad

vi2

-2a d

Page 9: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

Checking up pg. 82, #1-3

Page 10: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

September 23, 2011HW: None

Do Now: Get out 1.5 PTG #1-4 Discuss answers with

your group

Agenda: 1.5 PTG #1-4 1.5 Quiz Computer Set up (p4) Chapter Challenge Rubric Chapter Challenge Work

Day

Learning Objective: Understand how negative acceleration relates to braking and stopping distance

Success Criteria Calculate negative

acceleration and braking distance

Work on Chapter Challenge

Page 11: Negative Acceleration: Braking Your Automobile. Date: Sept 19, 2011 HW:PTG pg. 88, #1-4, Due Fri  Do Now (NB pg ?):  WDYS  WDYT  TB pg. 75  Read

1.5 Quiz