Hookes law lab.docx - EGMN 103: MNE Practicum I Lab Course...

EGMN 103: MNE Practicum I
Lab Course Instructor: Prof. Gulla
Lab Report Title: Hooke’s Law Lab
Assigned Lab Section: 005
Assigned Day and Time: Monday @ 2PM
Date and Time Lab Was Conducted: November 5, 2018 @ 2PM
Student’s Name: Pennyfeather, Jadarius
Partner’s Name: Foust, Philaja
PLEDGE: ______________________________________
“
On my honor, I have neither given nor received aid on this assignment”
Gulla Fall 2018

EGMN-103 Hooke’s Law Lab Pennyfeather, Jadarius
INTRODUCTION
According to Khan Academy, “When studying springs and elasticity, the 17 century physicist ᵗʰ Robert
Hooke noticed that the stress vs strain curve for many materials has a linear region. Within certain limits,
the force required to stretch an elastic object such as a metal spring is directly proportional to the
extension of the spring.” This is known as Hooke's law. In this lab, we will test whether rubber bands
follow Hooke’s law by conducting trials of increased forces acted upon them.
OBJECTIVES
 To investigate whether rubber bands follow Hooke’s Law
 Work with a partner.
 Produce a lab report which covers the work and details that were discovered
EQUIPMENT
1. Five identical rubber bands
2. Spring Force scale, 0-20N
3. Ruler, 60 cm
4. Hook (Large paper clip)
5. Tape
PROCEDURE
1. Number the rubber bands 1-5.
2. Create a table with 6 rows and 9 columns in the lab notebook for rubber band 1. Title it as:
‘Raw data for Rubber band 1
3. Insert the hook/paper clip into the hole at the end of the ruler.
4. Securely tape the paper clip to the desktop. Be sure to get a picture of the apparatus.
5. Adjust spring scale so that it reads zero.
6. Stretch the first rubber band to its maximum length (~45 cm) and hold for 5 seconds.
7. Repeat the stretching 10 times.
8. Loop the rubber band around the paper clip hook and the spring force scale.
9. Draw the rubber band out to its full ‘zero force’ length. Take a measurement at the end of the
paper clip (P0) and where the far end of the rubber band reaches (S0) and record in notebook.
Read the ruler as mm and read to the nearest 0.1 cm.
10. Pull the spring scale force to 2 Newtons and record the S2 length in your notebook.
11. Pull the scale to 4 N and record the length (S4)
12. Do the same for S8, S10, and S12.
13. Repeat these measurements with the same rubber band in order from 0-12 N a total of 5
times.
14. Take the first rubber band off of the paperclip/hook.
15. Create another table in the lab notebook for the second rubber band. Title the graph ‘Raw data
for Rubber band 2.’
16. Place the second rubber band onto the hooks and continue the experiment by taking its
measurements according to instructions 3 - 14. Do the same with rubber bands 3-5, per
instructions 3-14.