1. Newton’s 2 nd and 3 rd laws Tuesday, September 30, 2014

2. Tuesday, 9/30 Unit 3: Work and Forces  If you are new please come see.  New Seating Chart for 2SW  Pick up a warm-up from the Physics bin  Read the ‘I can’ statements on the side board.  Review dates below  Complete warm-up (2 minutes)  Upcoming dates  Thursday, 10/2 – quiz  Wednesday, 10/8 – quiz  Friday, 10/10 – Unit 3 test  Friday, 10/24 – last day to turn in 2SW extra credit  Friday, 10/31 – end of 2SW

3. Warm-up For each object listed in the table, find the weight of the object (on Earth) in Newtons G:G:G: U:U:U: E:E:E: S:S:S: MassWeight 25 kg 1.5 kg 115 kg

4. Review Quiz

5. Newton’s 2 nd Law – Practice problem 1 A car has a mass of 550 kg. 1. Find the weight of the car on Earth 2. Find the net force needed to accelerate the car at 12 m/s 2. 3. If a net force of 2200 N were to act on the car, what would its acceleration be?

6. Newton’s 2 nd Law – Practice problem 2 A sled weighs 2500 N on Earth 1. What is the mass of the sled? 2. What is the mass of the sled on the moon, where g = 1.6 m/s 2 ? 3. What is the weight of the sled on the moon?

7. Practice on your own

8. Newton’s 3 rd Law of Motion  Read and highlight notes from Newton’s 3 rd Law of Motion article.

9. Source: http://www.physicsclassroom.com/class/newtlaws/Lesson-4/Newton-s-Third-Law

10. http://www.physicsclassroom.com/class/newtlaws/Lesson-4/Newton-s-Third-Law