M3.6 Laboratory Report 8 Worksheet answers
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Name: ___Demauri Simpson_______________________________________ M3.6 Laboratory Report 8 Worksheet
PhET Simulation: Hooke’s Law
Instructions
You should download this page and complete all your work directly on the MS Word worksheet using MSWord, following the M3.6 Laboratory Report 8 Instructions.
Submit your completed Word document to the M3.6 Laboratory Report 8 dropbox. See the Schedule and Course Rubrics in the Syllabus Module for due dates and grading information.
.
The website you need for this is Phet Simulations (University of Colorado)
https://phet.colorado.edu/sims/html/hookes-law/latest/hookes-law_en.html
On opening the program, click on INTRO
===============================================================
Part 1 - Using one spring of force constant 200N/m
Use the program to record data in your table below- you will need to click on ‘values’ to take measurements of displacement (extension) from equilibrium.
Force Applied (N)
Extension (m)
1 N
0.005 m
10 N
0.050 m
50 N
0.250 m
60 N
0.300 m
75 N
0.375 m
100 N
0.500 m
1.
Describe the pattern in your results. How is the force applied related to the extension? Give examples from the data you have taken
The experiment's force application and spring's extension are related. The spring will extend farther in response to increased force. It appears that every Newton of force equals 0.005 meters of extension. For instance, 0.500 m of extension is obtained by multiplying 100 N of force by 0.005._______________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
_______________________________________________________
2.
Sketch the arrangement of the spring as shown on the screen.
Show the direction of the applied force on the spring AND the spring force on your diagram. Use
colour to tell them apart.
Diagram:
===============================================================================
Part 2 - Using two
springs of force constant 200N/m in parallel (side by side)
On the main menu go to SYSTEMS.
Vary the applied force and record the extension or displacement from equilibrium.
NOTE: Use the same
force values you used in Part 1.
Force applied n
Extension m
1 N
0.003 m
10 N
0.025 m
50 N
0.125 m
60 N
0.150 m
75 N
0.188 m
100 N
0.250 m
Force Applied (N)
Extension (m)
1.
Explain the main difference in the extension produced by this ‘spring system’ compared to the system in Experiment 1. When using a double spring system it seems to make results that are half of what the single spring made__________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
_____________________________________________________________________
Part 3 - Elastic PE stored in a Spring
On the main menu go to ENERGY
You should find a single spring system with a k value (force/spring constant) of 100N/m
Click on ‘Energy plot’ and ‘Values’. Enter data into the Displacement box to apply forces. Record the force applied and Energy below
Displacement/Extension (m)
Force Applied
(N)
Elastic PE (J)
0.1
10 N
0.5 j
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0.2
20 N
2.0 J
0.3
30 N
4.5 j
0.4
40 N
8.0 j
0.5
50 N
12.5 j
0.6
60 N
18.0 j
1.
Plot a graph of Elastic Potential Energy vs extension using Vernier Graphical Analysis
!
follow the link to download the graphing tool for free: https://www.vernier.com/product/graphical-
analysis-4/
).
Allow a scale on your x axis up to 0.7m
Draw a line of best fit and use it to predict a value for the Elastic PE stored at 0.7m extension, write your value below:
Value from curve of Elastic PE = _____25 j__________ when extension is 0.7m
Input an extension of 0.7m into the simulation and check/record value here:__24.5 j_____
2.
Try to find a relationship between the Elastic PE and the extension. What happens to the
PE as the extension doubles, for example, in the data you’ve recorded?
The data shows that when we double the extension in the experiment it quadruples the Elastic PE__________________________________________________________________________
____________________________________________________________________________
____________________________________________________________
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