11/21 qod

What is microgravity?  Where can we experience it?  Why do we experience it there?

--ch

11/18 qod

What is the first thing you should do when you solve a spring problem and how does this help you determine the sign of the spring force?

--ch

11/17 QOD

Is the spring force constant or does it depend on how far it is stretched or compressed?  Support your answer with evidence.

--ch

11/16 qod

What are the 4 different ways we could solve the simultaneous equations in tension problems and why are matrices the best way?

--ch

11/15 Mukherjee

At the beginning of class, we went over the Action and Reaction Pairs homework from the night before. For the rest of the period, each table had to do a balloon lab about Newton's 3rd Law that compared the balloon to a rocket. For the first two parts of the lab, the table had to blow up a balloon and stick it to a piece of straw that was threaded on the long string of yarn, which was held up tightly between two people, and let go of the balloon to compare which way the air went and which way the balloon went. The first part asked for the string to be held up straight horizontally, then the next part asked the balloon to be held up at a 45 degree angle and then straight up. The last part of the lab required two balloons to be inside a hollow styrofoam cup and from the way the balloons were positioned, if you let one go, that one moves along the string until it runs out of air, but the other balloon has to wait for the first one to leave before it can move along the string as well. The lab and follow-up questions were due at the end of the period and our homework was a page about all three of Newton's Laws. Something funny that happened in class today was when Mr. Kreider kept walking back and forth across the hallway and saw us doing the lab. Then he went into the classroom and told  Mrs. Coats-Haan that all we don't work in physics and all we do is play. Because he was walking back and forth so much, I told him that he was being a hypocrite because he wasn't doing any work. Mr. Kreider agreed. 


Question of the day: Why do rockets have stages?
I don't completely understand, but I think it's because the parts of the rocket are stuck tightly together that when it's time for lift-off and when the air/flames have to be released, each part has to take turns releasing the energy as only one can release energy at a time. 

11/15 qod

Why do rockets have stages?

--ch

11/14 Mazzella

today in class we turned in our Pogil from Friday if we hadn't already we also checked the free-body diagrams worksheet. we then built balloon helicopters by blowing up balloons, tying them to the end of a straw, and sticking a pin through the middle if the straw and into a pencil eraser. we then let the air out of our balloons , making them spin. we had to make sure that the top of the bendy straw (opposite to the side of the balloon) was bent or it wouldn't spin. we then took notes over Newton's third law, "for every action, there is an equal but opposite reaction". we watched a Julius Sumner Miller video, which covered this law, while we completed page 69 of our lab manual. our homework was page 75-76 of the lab manual.

11/14 qod

How does Newton's 3rd law apply to your balloon helicopter?

--ch

11/11 qod

How is the normal force oriented to surfaces?

--ch

11/10 Jesse

Today in class we had to turn in last night’s homework: Page 73-74 in the lab manual.  Mrs. Coats-Haan checked our homework that we did in the book, page 127 1-9.  Then we did some more examples of math problems that had to do with Newton’s Second Law on our notes example sheet.  Mrs. Coats-Haan then passed out our quarter assessments and explained her grading mistakes while we did a pair check.  After we finished our pair check and looking over our exams we turned both back in.  Our homework that is due tomorrow is on page 127 in the book, questions 10-17.  In our class Mrs. Coats-Haan kept confusing the Jacobs, since they sit right next to each other now. 

The question of the day is: If you have several forces acting in multiple directions on an object, how do you determine the object's acceleration?

I think the answer would be to use “FOXY” to add the forces and then apply the new force you just found to the F=ma equation. 

11/10 qod

If you have several forces acting in multiple directions on an object, how do you determine the object's acceleration?

--ch

11/9 Jenkins

Today what we did in Physics was first turn in the pages that we had for homework the night before. After we turned in the homework we took notes on classical mechanics, force, Newton's 1st law and Newton's 2nd law. After we finished the notes we watched a JSM video over inertia and completed page 67 in the lab manual. Finally, we got out homework which is pg. 73 and 74 in the lab manual and pg. 127 numbers 1-9 in the book. What I learned today was Newton's 2nd law.

QOD: The difference between mass and weight is that mass can be switched between inertia while weight is not interchangeable with inertia and has different units than mass.

11/9 qod

How are mass and weight different?

--ch

11/4 qod

Explain how Newton's first law applies to one of the many demonstrations today.

-ch

AND A CORRECTION TO FINNEY'S BLOG, THE FASTEST TIME WAS BY CLAY HAN OF MY CLASS, NOT KEITH BRADY OF MS. GROTE'S CLASS!!!!!!!!!!!!!!!!!!

11/3 Finney

We didnt turn in anything today because of exams but we did get a diagnostics test packet that is due tomorow. We had a pretty eventful class today. We got new seats, and did the inertia ball activity in the hall. The fastest time in the class was about 32 seconds by Stedman and was not fast enough to beat 26 seconds, which was the fastest time by Keith.

QOD: The times when you HAD to apply force to the ball was when you first started moving it, when you were turning, and when you had to slow down or stop. I say HAD because most people who did the activity applied force on the straight aways which caused them to lose control of the ball when they tried to stop it.

11/3 qod

When did you have to apply a force to keep the bowling ball on the inertia ball track?

--ch