March 15, 2010

Below is a summary of the data collected by each lab group as they sought to determine the how affects the period of a pendulum/spring oscillator.

PENDULUM - Period vs. Amplitude
Pendulum_-_Period_vs_Amplitude.jpgPendulum_-_Period_vs_Amplitude2.jpg


PENDULUM - Period vs. Length
Pendulum_-_Period_vs_Length.jpgPendulum_-_Period_vs_Length2.jpg


PENDULUM - Period vs. Mass
Pendulum_-_Period_vs_Mass.jpgPendulum_-_Period_vs_Mass2.jpg

SPRING - Period vs. Amplitude
Spring_-_Period_vs_Amplitude.jpg

SPRING - Period vs. Length
Spring_-_Period_vs_Length.jpg

SPRING - Period vs. Mass
Spring_-_Period_vs_Mass.jpgSpring_-_Period_vs_Mass2.jpg

Today March 16th in Class

Today in class we analyzed the data that we collected in class into a table that looks like this:

Length
Amplitude
Mass
Mass on Spring
As length increases period increases
As amp. increases period stays the same
As mass increases period increases
Pendulum
As length increases period increases
As amp. increases period stays the same
As mass increases the period stays the same
Next, we discussed the meaning of the words period and frequency. We created a chart with things that we do once a second, a day, a week, a month, and a year. This eventually gave us two equations that look like this

>PERIOD (T) = amount of time/ number of events (unit=seconds)

>FREGUENCY (F) = number of events/ amount of time(unit=cycles/second or HZ(Hertz))

The chart above and the equations listed sums up everything we learned in class today.

March 18th, 2010

Today we went to the science computer lab to work on our first webassign, but before that we had a demo. The slope of the line the data makes is called the spring constant or k. The spring constant in this case if external image latex2png.2.php?z=100&eq=30%5Cfrac%7BN%7D%7Bm%7D. We also learned that PE=external image latex2png.2.php?z=100&eq=%5Cfrac%7B1%7D%7B2%7Dkx%5E2%20, where x is the distance squared. Then we had a QOD asking what the velocity would be of a cart weighing 0.5kg, and we has to use Conservation of energy and make PE=KE then solve for velocity.
Force (N)
Stretch (m)
0.0N
0.0m
0.5N
0.01m
2.0N
0.06m
10.0N
0.3m
12.0N
0.36m