Dynamics September 17 2008

Hey yall if yall missed today's class or you need to refresh your mind this is what happened.

First Ms. K put an overhead up that had to diagrams of incline planes. Ms K then handed everyone out a transparency work sheet called: Forces On An Incline Plane. She also handed out another piece of paper but this time it was pink and it was called: Normal Forces, Friction, And The Incline Plane.


Ms K then went off to the office so that she could run off some more copies of the sheets so everyone can have one. When she came back we then corrected the Transparency Worksheet that she had handed out earlier. The answers are below.

1. What do you call the process of finding the magnitude of F_v?
Vector Resolution

2. Describe the relationship between F, F_v, and F_h?
F, = single Force
F_v, = Y Component.
F_h, = X component.
F_v is perpendicular to f_h

3. If F_h were negative, how would the diagram appear different?
F_h would point to the left.

4.If you only know the values of F and F_h what equation could you use to find F_v?
You would use The Pythagorean Theorem other wise know as a² + b² = c²

5. If you increase the angle at which F acts to 40^o, how will the components be affected?
F_v would increase and, F_h would decrease

6. Compare the set of vectors F_v and F_h with the set F_║ and F_┴. What do they have in common?
F_v and F_h are both component vectors and are ┴ to one another.

7. What cause the force W? Explain the orientation of this force vector?
Gravity, the orientation of this force vector will go down.

8. If the angle of incline were decreased to 15^o, how would the components be affected?
The parallel would decrease and the perpendicular would increase.

9. if you only know the values of W and Ø, what equation could you use to find F_┴?
You would use cosØ = F_┴/W

10. if the inclined plane is a frictionless surface, what other forces beside those shown acts on the trunk?
Weight and normal force is excreted by the trunk going upwards.


After we correct part of the chapter 7 study guide. The answer are below

Mix and match
11. e
12. c
13. g
14. b
15. f
16. a
17. d

18.


19


21.
Moves At a constant velocity.


After we correct chapter 7 study guide Ms K. then handed out two more pieces of paper one was a review worksheet and the other was a lab worksheet called: Coefficient of Sliding Friction. Tomorrow class will be a lab



Well yall that's all that we did in class hope this scribe post was useful the Next scribe will be Francis

Rguy/Richard out