1. MONDAY, JAN. 5 TH p. 120, 121

2. MONDAY, JAN. 5 TH 120 1/5/15 Mon. L.T.: I can use claim and evidence in debate to show my thinking about constant speed and acceleration. DO NOW: Write down at least 3 rules you can remember about describing the speed of a moving object. ……………………….. Reflection: Who do you think Ms. Kim agreed with the most and why? 121 Title: Frank, Quintin, and Sierra Arguments: Frank: (3 points, abbrev.) ……………………………………………… ………………. Quintin: (3 points, abbrev.) ……………………………………………… ………………. Sierra: (3 points, abbrev.) ……………………………………………… ……………… (scenario taped in)

3. 2 ND PERIOD  Something in motion tends to stay in motion  An object at rest tends to stay at rest  Moving objects are unbalanced forces  Speed = distance divided by time  For every force there is an equal and opposite force  ________________

4. 3 RD PERIOD DO NOW  Lincoln: There’s constant and average speed. Constant speed means you’re ALWAYS going 60 mph. Avg speed means sometimes you can be faster or slower than 60 but it averages up to 60 mph.  Mt. T: S x t = d  Foss: d/t = S  Wilson: Speed = distance divided by time

5. 4 TH PERIOD DO NOW  Lincoln: KE = 1/2mass x speed^2  Mt. T: an object in motion stays in motion and its an unbalanced force  Foss: To calculate speed… Speed = distance divided by time  Wilson: ???

6. 5 TH PERIOD DO NOW  (Verbally discussed)

9.  Silent Reading, VL 0, 2 mins.  Then, I need volunteers to be Frank, Quintin, and Sierra.. And a skateboarder and 2 speed machines. Anyone?

10.  Discuss at your tables what the main argument points each student had in their discussion. (at least 3!)  Use bullet points to organize and paraphrase each point  VL 2, 10 mins.

11. 3 RD PERIOD  Frank:  Sliding friction between wheels and ground 1  Forces are unbalanced on skateboarder  Maybe skateboarder slowed down and sped up 1  Quintin:  Forces are unbalanced because in motion 1111  Normal force is opposing gravity 111  Friction should slow down skateboarder always; machines are wrong 1-1-1  Sierra:  Something in motion can still be balanced 111-1-1  Air friction is acting on skateboarder 1  Acceleration is when an object speeds up/slows down  Friction isn’t always strong enough to overcome kinetic energy

12. 4 TH PERIOD  Frank:  Sliding friction between wheels and ground  Skateboarder may have slowed down and then sped up1  If an object speeds up or slows down, its because an unbalanced force is acting upon it 1  Quintin:  Things in motion are unbalanced.11  Friction always makes things slow down  Machines are wrong; skateboarder is slowing down 1  Skateboarder’s forces are unbalanced 1  Sierra:  Forces are balanced because skateboarder is going same speed entire time -11  Air friction is acting against the skateboarder11  Acceleration is when something speeds up or slows down  Only if friction is strong enough will it overcome kinetic energy 1

13. 5 TH PERIOD  Frank: -1  Skateboarder is moving so its forces are unbalanced. 1  Sliding friction between wheels and ground. 1  Maybe skateboarder slowed down and then sped up.  Quintin:  If something’s moving, its unbalanced.  Normal force and gravity combined overcome friction.  Friction always slows down the skateboarder  Sierra: 1  Kinetic energy vs. friction – if friction is strong enough it’ll stop the KE  Something can be in motion and still be balanced.1-1  Skateboarder has air friction acting against him. 1  Acceleration is when an object speeds up or slows down. 1

14.  Rules for debate:  YOU MUST CHOOSE A SIDE. No waffling in between or just sitting in your seat. You can change sides if something you heard someone say convinces you.  YOU MUST SPEAK AT LEAST ONCE. If you’re having a hard time finding something to say, someone can feed you a question or a statement. People can talk more than once only after everyone’s pebble has been deposited.  NO SPEAKING UNLESS YOU HAVE THE BEAKER. The beaker will be passed around from group to group after 2 speakers have gone.  IF YOU’RE GOING TO MAKE A CLAIM, YOU NEED TO ALSO HAVE EVIDENCE TO BACK IT UP. No “This is right because I say so.”

15. 2 ND PERIOD  Isabel: measure every single moment to see if speed is constantly the same  Myracal: notebook says speed, if it’s not moving, it’s balanced. Same friction.  Vanderhoff: disagree, bc when going down slope, speed increases and speed slows down bc don’t have same angle  Melanie: hear what you’re saying, balanced bc not moving, but skateboard is unbalanced bc moving.  Ms. Tudor: Quintin, bc skateboard is in motion because if the object is in motion, its unbalanced.  Kha: Skateboard will go at the same speed.  Levi: Agree with Kha because ….  Jaden Wade: Agree with Kha bec since sb is going at same speed, forces are balanced, but if speeds are different, forces are unbalanced  Ghorgeous: It’s not balanced bc added force is pushing it down and frictional forces are pushing it up  Stephanos: Agree with Quintin bc an object in motion is unbalanced, you tend to gain speed as you go downhill. Flats, I slow down.  Vanderhoff: Q bc machines could have been wrong, when you go down a hill, its harder to pedal, skateboard you need more power in legs to go across flat surface  Mr. Milan: Agree with Kha with going down hill, not accelerating but staying at same speed. Friction keeps you at same speed.  Devon: AT top of hill, he was going slow, downhill, he sped up.. Objects in motion can still be balanced forces.  Kha: disagree. Object can speed up or slow down  Ryan: 1 st, Frank and Quintin have same idea about the skateboard moving and are unbalanced.  Mariela: an unbalanced force was acting on an object so its speed changed.