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Cglez1280
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Homework Statement
Two identical balls (B and C) with a mass of .5 g are suspended from two strings as shown above. The balls carry equal charges +10nC each and are separated by a distance of 4 cm.
A. Draw the free-body diagram and show all forces applied to ball C.
B. Find the tension force in the string BC.
C. Draw free-body diagram and show all forces applied on ball B
D. Find the tension force in string AB
E. Answer question a, b, c, d for the situation when the balls have equal but opposite charges (charge on B is positive and charge on C is negative).
Variables
Ball C mass= 0.5g=0.0005Kg
g=9.81
a=0m/s^2
Homework Equations
?
The Attempt at a Solution
Okay so i thought the regular force tension equation would work but it didnt. I used Ft=w+ma. Using the variables I put the variables in each one. I did Ft=0.0005kg*9.81m/s^2+0.0005kg*0m/s^2 and got 0.004905, but turns out that is not the correct answer. The answer I'm supposed to get is 0.00546 N and I don't know what to do. Also I'm not sure what would work.
My free body diagram, the first one is for Part A and the second one is for Part C.
https://www.physicsforums.com/attachments/105387 https://www.physicsforums.com/attachments/105388
https://www.physicsforums.com/attachments/free-body-diagram-one-png.105387/ https://www.physicsforums.com/attachments/free-body-diagram-two-png.105388/
[Moderator's edit note: Images retrieved from member's repeat post of this problem]
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