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Coulomb's Law Part 2 a.notebook
1
February 27, 2013
Feb 268:18 AM
Coulomb's Law
2D Applications
Feb 262:50 PM
Coulomb's Law Part 2 a.notebook
2
February 27, 2013
Feb 262:50 PM
Divide the total charge by the charge per electron to determine the number of electrons.
Feb 262:48 PM
Vector Nature of Coulomb's LawThe electric force is a vector, which means it can
be added, subtracted or broken into x and y
components like any other vector.
Mind your negative signs (for direction only!!!)
Math + Physics = FUN!!!
Coulomb's Law Part 2 a.notebook
3
February 27, 2013
Feb 262:53 PM
Feb 263:07 PM
Horizontal Components:
Vertical Components:Use Pythagorean Theorem
Coulomb's Law Part 2 a.notebook
4
February 27, 2013
Feb 258:47 PM
Example 2: Find the net electrical force on B.
A
B C3.20 m
4.1 m
2.0 x 106 C
3.8uC 1.5 uC
A→B
down on B
Feb 258:47 PM
B→C
left on B
Coulomb's Law Part 2 a.notebook
5
February 27, 2013
Feb 258:47 PM
Draw Vector Diagram
Feb 258:47 PM
Example 3:• Three point charged objects are arranged in a right angle as shown in the diagram.
a. The charge on object A is positive. Identify the sign of the charge (+ or ‐) on object
• i. B. (negative)
• ii. C. (negative)
Coulomb's Law Part 2 a.notebook
6
February 27, 2013
Feb 258:47 PM
b. Determine the net electrostatic force acting on charge B.
Feb 263:06 PM
Coulomb's Law Part 2 a.notebook
7
February 27, 2013
Feb 268:15 AM
Read WB p. 85‐86 TB p. 532‐6 Examples 10.3 to 10.6
Do WB p.87 5, 10, 15, 19
Assignment: