 Set up notebook for new unit in notebook  Make a Unit cover ◦ Unit title: Gravity, Momentum, Energy, Thermo, Waves (pg 1)  New Table to Contents (pgs. 2-3) ◦ #1 Week 1 Warm Uppg 4  New for this semester just write warm ups and objectives in notebook using format from before not going to use the handout, less gluing. ◦ #2 Newton’s Law of Gravitypgs. 5-6 ◦ #3 PhyzJob: Proportional Reasoning pg. 7

 Gravity Rap Gravity Rap

1. What is impulse? 2. How would you decrease the amount of impact force? 3. How would this affect the impulse?

 Pick up Impulse & Momentum Lab from front table  Read through the background and procedures in preparation for class today ◦ Note any questions you might have regarding the procedures  Answer the Preliminary Questions on pg 2 of the lab

1. Why does a rifle recoil when fired? 2. How does this relate to momentum?

 Write a 200 word minimum conclusion about what you discovered in the lab. Include ◦ Briefly describe the procedures of lab ◦ Does the direction of the velocity affect your results? Explain. ◦ How did the different rubber bands affect the impulse? ◦ Which type of rubber band experienced the greater force? ◦ How did the change in momentum compare with the impulse for the various trials? ◦ Describe an example of how impulse and momentum in the real world.

1.Describe what happens to the velocity of each vehicle after the crash. 2.What happened to the truck’s momentum after the collision? Where did the momentum go? 3.What is the total momentum of the vehicles after the collision since they stuck together?

Suppose you are traveling at highway speed and a bug suddenly splatters all over your windshield 1.Compared to the force on the bug how much force acts on the windshield? (more) (the same) (less) 2.The time of impact is the same for both. The impulse of the bug is _____ the impulse on the windshield. 3.Which experiences the greater change in momentum the car or the bug? 4.Which experiences the greater acceleration?

Newton’s Cradle Toy 1. What kind of collision is this? 2. Describe what happens to the momentum of the green sphere. 3. What happens to the kinetic energy of the green sphere? 4. What would happen if the orange, yellow and green spheres were all given potential energy then released?

Work on the Ranking Task Worksheet at the front of the room *FYI Study guide for test on Website and Remind. Test is Tomorrow. 25 Ques (Mix of concept, problems and application)

 Prepare for Gravity & Momentum Test ◦ All Bags in Hallway!!! ◦ Need Calculator, pencil and piece of blank scratch paper ◦ Pick up and fill out Scantron info  NameForm: _________  Date  Subject: Gravity & Momentum Good Luck and do your best, you got this

 Pick up handouts and read about Egg Drop Project ◦ Estimated drop date will be next Tues, Feb 10 ◦ Think of questions you might have

Read the following statements and determine whether or not they represent examples of work. Justify your choice 1. A teacher applies a force to a wall and becomes exhausted. 2. A book falls off a table and free falls to the ground. 3. A waiter carries a tray full of meals above his head by one arm straight across the room at constant speed at the same height. 4. A rocket accelerates through space.

 Use your key terms, foldable and blue book if necessary to complete the Work and Energy In Class Review ◦ They use some different letters for energy on this worksheet  E P = Potential Energy and E k = Kinetic Energy ◦ I gave you some hints for the math problems. All equations are in the foldable from Monday. Using concepts of conservation of energy and work- energy principle

 Pick up today’s assignment from front  Get out Key Terms so I can check them off  Figure out what questions you have on yesterday’s assignment  FYI: Next Lab Tomorrow  Make sure you have your Gravity Lab, Impulse Lab and Virtual Air Track Labs turned in. I am trying to get them entered for the Grade check on Friday

 Complete Preliminary Question for Energy of Tossed Ball Lab

Warm Up 2/11/2015

Frank, a San Francisco hot dog vender, has fallen asleep on the job. When an earthquake strikes, his 300 kg hot dog cart rolls down a hill and reaches point A at a speed of 8.00 m/s. How fast is the hot-dog cart going at point B when Frank finally wakes up and starts to run after it? (Hint: Think Conservation of Energy) A B 50 m 30 m Warm Up 2/12/2015

Frank, a San Francisco hot dog vender, has fallen asleep on the job. When an earthquake strikes, his 300 kg hot dog cart rolls down a hill and reaches point A at a speed of 8.00 m/s. How fast is the hot-dog cart going at point B when Frank finally wakes up and starts to run after it? Frank, a San Francisco hot dog vender, has fallen asleep on the job. When an earthquake strikes, his 300 kg hot dog cart rolls down a hill and reaches point A at a speed of 8.00 m/s. How fast is the hot-dog cart going at point B when Frank finally wakes up and starts to run after it? A B 50 m 30 m v = m/s