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???