LAB

1
LAB 5

• HOOKES LAW
• FUN WITH SPRINGS

2
GOALS

• TO DISCOVER THE RELATIONSHIP BETWEEN THE FORCE
  APPLIED TO A SPRING VS THE STRETCH
• (HOOKES LAW)
• TO DETERMINE THE SPRING CONSTANT (k) OF A SPRING
• TO USE INTERACTIVE PHYSICS TO SIMULATE HOOKES LAW

3
PROCEDURE

• CHOOSE 3 DIFFERENT SPRINGS
• GIVE EACH A DISTINCTIVE NAME
• HANG EACH SPRING. MEASURE INITIAL, UNSTRETCHED
  LENGTH
• HANG MASSES FROM EACH SPRING, MEASURING THE
  STRETCH CAUSED BY EACH MASS
• REPEAT FOR ATLEAST 5 DIFFERENT MASSES.
• REPEAT EXPERIMENT USING INTERACTIVE PHYSICS

4
MASS vs WEIGHT
m
W weight
W
g 9.8 N/kg
W mg
5
Measure Spring Stretch
DL1
DL2
6
Measure Spring Stretch
DL1
DL2
7
DATA TABLE
8
GRAPH 1 CHUNKY
FORCE (N)
STRETCH (m)
9
GRAPH 2 PEE-WEE
FORCE (N)
STRETCH (m)
10
GRAPH 3 SLIM WHIT
FORCE (N)
STRETCH (m)
11
WRITE-UP

• ABSTRACT
• BACKGROUND (Intro, Goals)
• METHOD
• SCREEN SHOT OF I.P. WITH VECTORS ADDED (W, DL)
• DATA TABLE
• GRAPHS
• TRENDLINES
• SLOPE ANALYSIS
• CONCLUSION

12
Lab 2 Hookes Law

• Post lab Analysis

13
FORCE VS STRETCH
F a DL
F
k
constant
slope
DL
FORCE (N)
k spring constant
(N/m)
k F/DL
STRETCH (m)
14
HOOKES LAW
k F/DL
F k DL
15
SPRING CONSTANT (k)
k a F
The bigger the k, the stiffer the spring
16
Hookes Law
Spring A stiffest
Spring A
k slope
FORCE (N)
Spring B
Slinky k 0
STRETCH (m)