Physics 12 Lab #3

Vectors!

Apparatus

Calculator, pen, paper and class notes
Meter stick
Protractor
Tape measure
Chalk
Calculator, pen, paper and class notes
Transit (IŽll show and explain it)
Compass

Vectors

I can't get vector arrows to come out in html so I have used an alternate format (as in the textbook) where I use bold to represent vectors.

A = 2.0 m at 35o above the (+)x-axis
B = 1.0 m at 55o above the (-)x-axis
C = 3.0 m along the (-)y-axis (read this one carefully)

D = 2.15 m at 22o below the (-)x-axis
E = 2.24 m at 5o below the (+)x-axis
F = 3.0 m at 61o above the (+)x-axis

G = 25.0 m at 35o North of West
H = 17.0 m at 15o South of East
I = 20.0 m at 55o North of East

Procedure

We will be doing this lab at the gym and lower soccer field and you should work in groups of four. The last section will be doable only if I happen to get my hands on the transit and compass by tomorrow.

Part #1 Graphical solutions to vector equations.

Use the chalk, protractor and meter stick to solve the following vector equations by using the graphical method.
  1. A + B + C
  2. A - B + C
  3. D + E + F
  4. Describe in writing how comfortable and sure you are with each of the three results. (Is there anything unsettling about the third result?)
Part #2 Component method solutions to vector equations

Use the calculator, pen, paper and class notes to solve the following vector equations by using the component method. Give your results in both component and mag/dirn forms.
  1. A + B + C
  2. A - B + C
  3. D + E + F
  4. Draw your results on the gym floor with chalk using first the mag/dirn results and then the component results. Which way is easier for drawing? How do the results compare to those found in part 1 using the graphical method?
  5. Describe in writing how comfortable and sure you are with each of the three results. (Is there anything unsettling about the third result now?)
Part #3 Transit and compass method of solving vector equations

Go to the lower field and use the transit and tape measure to solve the following vector equation by using something like the graphical method. You are doing what surveyors do for big bucks now. (I will explain how to use the transit.)
  1. G + H + I
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