Electric field

  • Thread starter Jabababa
  • Start date
  • #1
52
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Homework Statement



a 030 kg ball is suspended in a uniform electric field as shown. If the charge on the ball is 500 x10^-4 C, what is the electric field strength?

Homework Equations



E= F/Q

The Attempt at a Solution



I did this by using the triangle method. draw the forces with a triangle(look at the attachment).
My question is did i draw the triangle right? Does the direction of the Electric field affect my answer?
 

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Answers and Replies

  • #2
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My question is did i draw the triangle right?
Since the ball is in equilibrium, the forces on it must add to zero.
Look at the direction of the tension force in your triangle.
 
  • #3
52
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oh my, thank you so much ap123!

I just got the tension force backwards, now it makes much more sense!!!! thank you !!
 
  • #4
265
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Have you worked out the value for the electric field?
 
  • #5
52
0
yes i got 1.25 x10^3 N/C to the left
 

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