Lesson Review 21A...... October 20, 2000    

              Another Page in our Diary Cleophas McAlpin...Tutor

...Welcome Deandre (13), a new student

Velocity! We have armed ourselves with a knowledge of Scientific Calculators and have marched out to do problems relating to vectors. Physics problems (9th grade) are now a snap! We also have the Internet Resources:  

  www.glenbrook.k12.il.us/gbssci/phys/mmedia/index.html  Physics : General Math and Science  (Gif Animations of Mathematics and Science...a must see!)

  www.lightlink.com/sergey/java/index.html   (Physics Animations) to assist us!

Mr. Smith launches a rocket with an initial velocity (V_o) of 143 meters/sec. The horizontal component of the velocity (V_x) is 132 meters/sec. Draw the diagram of what the rocket's flight looks like. Find the vertical component of the rocket's velocity (V_y). Find the firing angle.

Sheena (13) and I used the Pythagorean Theorem at first. Then we checked our answer by finding the direction and velocity using trigonometry and the Scientific Calculator.

    Pythagorean Theorem Solution                Trigonometric Solution

Sheena has gained an understanding of velocity vectors and I am certain that her examination in Physics at Drew Magnet School on Monday will be a snap!

We had did a "Spanish Language Blitz". Five of the students present are taking Spanish at various schools. The students reviewed approximately 50 Spanish words and took an oral examination on the use of them.

Deandre and Asia worked some of the problems on my examination, while the other students continued their homework assignments in Biology, Spanish and Mathematics. I assisted them as it was necessary.

Sheena and I spent approximately 1 hour doing velocity problems. It was a one-on-one session. Sheena prefers the Pythagorean Theorem to do the problems, but I have added a "system of checks" with the trigonometric solution.