Newton's 2nd law Lab

I know this is very late. I almost forgot that I'm scribing=( Anyways, like Ms. Kozoriz told us last tuesday, we did a lab for Newton's 2nd law (wed. class). As soon as the class started, Ms. K gave us the sheets for the lab & explained to us what to do. The equipments were all ready, like the rolling carts, pulleys, long boards at the corner of the room.etc. This lab took us the whole period of class and our group didn't finish the graphing part yet where you can see the distance between tucks (in cm) in different time intervals or the acceleration. Sorry if I can't explain that much of it because I don't have the copy of the lab. So if you were away yesterday, just grab the lab sheet and you'll know what I'm talking about=) That's it for today! (Sigh...)

Hmmm...since Jadanet mentioned him already, the next scribe is Justus
don't be mad=P

Wednesday class...

For today's class, Ms. K gave us the answers in our worksheet-chapter 3: study guide (the back part). Here are the answers:
3.2
Positive and Negative Velocities

1. postive
2. negative
3. positive
4. right
5. left
6. magnitude
7. positive negative

Instantaneous Velocity

1. straight
2. tangent
3. slope

Velocity-Time Graphs

1. time
2. velocity
3. horizontal
4. parallel
5. positive
6. negative
7. vertical
8. displacement
9. position
10. position

Then, she gave us another worksheet, mostly, it has a position-time graph. This took most of our time answering it then we went over the answers but I don't think we went over on the very last part. Here's what I've got:

Sample problem

(a) A      (b) 750m      (c) C      (d)
                                   (i)   750m
                                   (ii)  250m
                                   (iii) -750m
                                   (iv)  0

(e) velocity for section A: 5m/s B: 2.5m/s C: 0 D: -3.75m/s

(f) 1500m

Practice (A)

1.   a) .5m/s   b) 0.83m/s    c) 0.6m/s

2    a)  4m             b) 3m             c) 1m/s

3.   a)  160km[N]       b) 80km/h[N]      c) 0.5h

4    a)  50km/h         b) $-1.25/week   
    c) -.625kg/week    d) 50N/m
    e)   80kg/m^3      f)  -1.5°C/s

That's it for today's class...sorry it's late. Next scribe: Mike???

Reflection and Refraction

Today's class, we quickly went over the answers on our assignment nos. 5-8 on the 2nd green booklet. Then we spent almost all of our time watching the video of Reflection and Refraction. Ms. K gave us white sheet to answer while watching and went over it after watching.


Here are the answers for 5-8 on the green booklet:


5. λshallow= 1.1 cm


6. a. n= 1.33


b. Vdeep = 4 cm Vshallow = 3 cm


c. = 22°


7. angle of refraction= 36.9°


8. Vr = 5.6 km/s




...and for the answers on the white sheet of Reflection and refraction, just click the links below:


Waves in 2D: RnR

Waves in 2D: RnR2


tomorrow, tuesday Sept.25, is the due date for the Waves Research Project. Don't forget to hand it in.

the next scribe is.....Jamesa-