Tuesday, March 8, 2011.

Salutations.

In today's wonderful class we went over our assigned homework pages in our Dynamics booklets. We went over the answers of page 31, "Transparency 4-2 Worksheet" and how it was done. Don't forget to convert what you're given (km/h to m/s, and hours to seconds) to fully answer what the question asks for. Unfortunately I left to go to the washroom at the end of this page, and came back when we had to work on the new sheets. If someone would please enlighten me on what went on during my absence and leave it in the comments below for everyone to view, that would be greatly appreciated.

Continuing on with the second half of class, we were given two sheets labeled "Dynamics-Vectors" which was for practice, and "Forces in Two Dimensions" which was to be handed in. We were to plot the vector of the plane's velocity on the graph provided.

• The questions asks that you first decide on a scale, in which case [1cm = 10m/s] was recommended. Also label the directions (north, south, etc.) but I bet you already knew that.
• The next step would be to take your protractor, starting at the origin, and place a line 30 degrees to the north of east direction.
• If you did this correctly to the scale recommended, you will have a 6cm line (because the velocity is 60 m/s) with an arrow at the end because it is a vector. Place your protractor on top to make sure it is aligned with the 30 degree mark.
• Next you were to add another vector, representing the velocity of the wind that "blows on the airplane with a speed of 8m/s going in the direction 75 degrees south of west in the same way." Again, line it up with your protractor to make sure it is accurate.
• The resultant line would be the line connecting the origin to the head of the wind vector.
• The last part was to answer the few questions on the back, which deals with the beautiful diagram you just created.

I assume this should be finished by tomorrow's class. A reminder to bring your own protractor to avoid the unlikely event of having to buy one as I did. If there's anything I missed, comment below!

Don't forget the test on Friday! Have a wonderful evening, the next scribe shall be justing.