Name _______________________ # ______   Date _____________
Regents Physics   Mr. Mangiacapre

Period And Length Of A Pendulum           

Word-process this lab using the standard format we have used all along.

Notes from teacher discussion -  Use the information below in your introduction -

Why is an understanding the pendulum important? __________________________________

_____________________________________________________________________________

Period - ____________________________________________________________________
 
What effects the period of a pendulum? What doesn’t?______________________
 
______________________________________________________________________________

 

Purpose: (a) To find the mathematical relationship between the period (T) of a  
     pendulum and it's length.
  (b) To come up with an equation that relates period to length using
      y = mx+ b (using (T2 vs. l) plot)
  (c) To use the equation you found to find the period of a pendulum with a
     length of  _____________ (to be announced next week)
  (d) To use the equation: to calculate the acceleration due to gravity (g).
Important: Measuring the length of the pendulum
 
 ***Measure from the top pivot point of the string to the MIDDLE of the bob

Data Table (Reproduce this data table in the SIMPLE TABLE format you've used all along)
 

 Length

(cm)

Time for 10 vibrations

(second)

 Period
(Time for one vibration)

(second)

 Period 2

(second)2

0

 

0

0

0

10

 

 

 

 

20

 

 

 

 

30

 

 

 

 

40

 

 

 

 

50

 

 

 

 

Plotting Data

First Plot    Period vs Length         Second Plot - Period2 vs  Length

Put L on the vertical axis for both plots

Finding the Equation using y = mx + b for the second graph



What's the y variable on the second plot? (Variable on vertical axis)  
What's the x variable on the second plot?  
What's your m value (slope)  
What's your b value (y intercept)  

 

Substitute all theses values into y = mx + b



Mandatory - On page 2 of your lab: Replicate the pendulum drawing on the first page of this worksheet using your word processors' drawing tools. Give your drawing a centered title and be sure to include the label and the caption.