Momentum

Documents you may need:

1) Physics Dictates Crash Outcomes Article (pdf)

- Questions to be answered in your Notebook about Article (google doc) (This is Activity #4 and needs to be completed in your Notebook)

2) Car Crash Analysis Activity (pdf or google doc) (This activity was completed in class on Friday, Jan. 12th)

- Go to "http://www.tinyurl.com/IIHScrashes" and watch 2 crash videos from the IIHS Youtube Channel in order to fill out the Google Form

- Post-Crash Video Analysis Questions (This is Activity #6 and needs to be completed in your Notebook):

1. Why do crash test dummies move forward in the cabin during a crash? How are they usually stopped from moving forward?

2. Using the terms Impulse, (Change in) Momentum, Change in Time, Force and Change in Velocity, describe how all safety devices in cars work to save people’s lives in AT LEAST two complete sentences.

3) Crash Barrier Lab (google doc or pdf) (This is Activity #7 and needs to be completed in your Notebook)

4) Air Track Observation Lab (pdf or google doc) (This is Activity #8 and needs to be completed in your Notebook)

- If you were absent you can complete the Alternate Lab (pdf or google doc)

Additional Worksheets:

Momentum & Crashes Worksheet (blank copy & answers)

Lecture Notes from this Unit: (you'll need to be signed in to your PUSD Google account in order to access them)

Momentum & Impulse (This is Activity #1 and needs to be completed in your Notebook)

Bouncing (This is Activity #2 and needs to be completed in your Notebook)

Conservation of Momentum (This is Activity #9 and needs to be completed in your Notebook)

Homework Help:

December 9th, 2015: Pg. 245 #30; Pg. 250 #41, 42, 53, 65, 67, 68

64. >40

65. a. ~100 b. ~500

67. a. >5 b. ~100 c. ~10

68. a. >7 b. <1.5E4

December 10th, 2015 pg. 245+ #72, 77, 80, 89, 90

72. a. Use the Impulse Momentum Theorem (200), b. Use the Impulse Momentum Theorem (4000), c. Use F=mg and solve for m. (<450), d. & e. DUH

80. A two becomes one problem: m1vi1+m2vi2 =(m1+m2)vF (>10)

89. a. Use kinematics equations to determine the speed the dancer would have to leave the ground in order to go that high. (<3). b. Use the Impulse Momentum Theorem. (150)

90. b. A THREE becomes ONE problem. m1vi1+m2vi2+m3vi3=(m1+m2+m3)vF (<0.05)