Physics 12 - Quiz 3


Electric Field, Forces, Potential, and Potential Energy

Solution:

1. Drawing the free-body diagram shows that the weight is being balanced by both the electric force and the tension in the thread.

2. 

 

3.

a) 

therefore the work done by an external agent is

b)

 

4.

a)

b)

a positive answer is also acceptable, either answer is correct.

5.

 a)

b)

6.

 a)

 b)

 

c) 

 

 
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