PHYSICS
INTRODUCTION TO SIMPLE HARMONIC OSCILLATORS LAB

( CAPT
STYLE!... work together, hand in individually!)

For
each section:

Design the
experiment to measure

(Be sure to
indicate independent and dependent variables)

Write a
procedure

Make a data
table

Make a
prediction

Carry out
the experiment and collect the data

Note any
problems and/or difficulties

Graph all
results

Make
general conclusions

A) For
a string pendulum: Find a mathematical relationship to predict the period of a
pendulum.

Find the
determining factor (weight, length, angle <<15 degrees)

Measure its
distance, height, or velocity vs time. Measure time accurately (10 swings, then
divide by 10)

Plot at
least three points to decide the most direct relationship. Use data from regression
equations and correlations to prove your results.

Once you
have found the property that determines the period, find the exact mathematical
relationship (linear, quadratic, etc...), so use at least three to seven
points. (Hint: 0,0 is a point).

Check your
result with the theoretical relationship as described in your text.

** In at
least one of your trials try to measure distance,height, velocity vs. time

B) For a weight hanging off a spring, Find
the determining factor (weight, spring size, initial distance).

Measure its
height, velocity, acceleration vs. time. Measure time accurately (10 swings,
then divide by 10)

Plot at
least three points to decide the most direct relationship. Use data from
regression equations and correlations to prove your results.

Once you
have found the property that determines the period, find the exact mathematical
relationship (linear, quadratic, etc...), so use at least three to seven
points. (Hint: 0,0 is a point).

Check your
result with the theoretical relationship as described in your text.

** In at
least one of your trials try to measure distance,height, velocity vs. time

C) Use
a circular object to turn and measure displacement vs time. Try different rates
and radii. Use your results to explain how this is simple harmonic oscillation.

1.
In your own words,
clearly state the problem you are going to investigate. Include a clear definition of the
independent and dependent variables that will be studied.

2.
Design an experiment to
solve the problem. Your experimental design should match your statement of the
problem, should control the variables, and should be clearly described so that
someone else could easily replicate your experiment. Include a control if appropriate. Show your design to your teacher before you begin your
experiments.

3.
After receiving
permission from your teacher, work with your partner to carry out your
experiments. Your teacher’s
approval does not necessarily mean that your teacher thinks your experiments
are well designed. It simply means
that in your teacher’s judgement your experiments are not dangerous or likely
to cause an unnecessary mess.

4.
While conducting your
experiments, take careful notes.
Make sure to use appropriate charts, tables, or graphs. Your notes will not be scored, but they
will be helpful to you later as you work independently to write about your
experiments and the results. You
must keep your own notes because you will not work with your lab partner when
you write your report.

Directions for Writing Your Laboratory Report

Working
on your own, summarize your experiments and results. You may use your own notes that you took previously while
working with your partner. You may
wish to write a first draft of your lab report on scratch paper.

Your
report should include the following general sections:

·
A clear statement of the
problem you investigated. Include
a clear identification of the independent and dependent variables that were
studied.

·
A description of the
experiment you carried out. Your
description should be clear and complete enough so that someone could easily
replicate your experiment.

·
The results of your
experiment. Tables, charts, and/or
graphs should be used where appropriate and should be properly labeled.

·
Your conclusions from
your experiment. Your conclusions
should be fully supported by data, and include appropriate calculations and
analysis.

·
Comments about how valid
you think your conclusions are. In
other words, how much confidence do you have in your results and
conclusions? Any factors that
contribute to a lack of confidence in the results or conclusions should be
discussed. Also, include the ways
that your experiment could be improved if you were to do it again.