The College at Brockport: State University of New York
Digital Commons @Brockport
Lesson Plans
CMST Institute
3-1-2005
Using Interactive Physics to Show Coulomb’s Law
Steve Whitman
The College at Brockport, [email protected]
Follow this and additional works at: http://digitalcommons.brockport.edu/cmst_lessonplans
Part of the Physical Sciences and Mathematics Commons
Recommended Citation
Whitman, Steve, "Using Interactive Physics to Show Coulomb’s Law" (2005). Lesson Plans. Paper 314.
http://digitalcommons.brockport.edu/cmst_lessonplans/314
This Lesson Plan is brought to you for free and open access by the CMST Institute at Digital Commons @Brockport. It has been accepted for inclusion
in Lesson Plans by an authorized administrator of Digital Commons @Brockport. For more information, please contact [email protected].
BHS Physics
LAB #16
Coulomb’s
Law
BHS Physics
Coulomb’s Law
Force between Charges
+QA
Fe1
Fe1= -Fe2
d
+QB
Fe α Q A
Fe α Q B
2
Fe α 1/d
Fe2
BHS Physics
GOALS: Part 1
• To test the relationship between
electrostatic force vs distance
Fe vs d
PROOF: Fe = mg tan Θ
BHS Physics
sin Θ = X/L
L = PEND LENGTH
Ty = T cos Θ
Ty
QA
Fe
mg
Θ
ΣFx = 0
Θ ΣFy = 0
Fe = T sin Θ
mg = T cos Θ
Y
T
Tx
=
T
sin
Θ
Tx
QB Fe
X
D
BHS Physics
PROOF: Fe = mg tan Θ
ΣFx = 0
ΣFy = 0
Fe = T sin Θ
mg = T cos Θ
T = Fe/sin Θ
T = mg/cos Θ
Fe/sin Θ = mg/cos Θ
Fe = mg tan Θ
BHS Physics
PART 1: Fe vs D
Θ
Y
L
Ty
BALL A
Θ
SET: POS Y = body [1].p.y
Tx
X
D
BALL B
BHS Physics
TABLE OF CONSTANTS:
PART 1
1
BHS Physics
PROCEDURE: PART 1
BHS Physics
DATA TABLE: PART 1
.
SAMPLE DATA TABLE· PART 1
-
TRIAL
Xo BALL B
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D (m)
1/DA2
X (m)
y (m)
tan® (XIV)
Fe (N}
BHS Physics
FORCE (N)
GRAPH #1
DISTANCE (m)
BHS Physics
FORCE (N)
GRAPH #2
1/D2 (1/m2)
BHS Physics
GOALS: Part 2
• To test the relationship between
electrostatic force vs charge
Fe vs Q
BHS Physics
PART 2: Fe vs Q
Θ
Y
L
Ty
BALL A
Θ
SET: POS Y = body [1].p.y
SET: POS X = body[1].p.x+d
Tx
X
D
BALL B
BHS Physics
TABLE OF CONSTANTS
PART 2
10
BHS Physics
PROCEDURE: PART 2
BHS Physics
DATA TABLE: PART 2
Θ (X/Y)
BHS Physics
FORCE (N)
GRAPH #3
CHARGE (C)
BHS Physics
WRITE-UP
• ABSTRACT:
– BACKGROUND
– METHOD
• IP SCREEN DUMP WITH VECTORS ADDED
– SHOW PROOF OF: Fe = mg tan Θ
• DATA TABLES
• GRAPHS
– TRENDLINES
– SLOPE ANALYSIS FOR LINEAR GRAPHS
• CONCLUSION