Initial acceleration of a charged particle

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1. Jan 16, 2012

hudsonale10

1. The problem statement, all variables and given/known data
If sphere 2 were free to move its initial acceleration would be ___m/s^2

2. Relevant equations
Two small spheres carrying charges q1 = 7.68 µC and q2 = 5.74 µC are separated by 19.9 cm. The mass of sphere 1 is 10.5 g and the mass of sphere 2 is 15.2 g.

3. The attempt at a solution
Not sure how to start this one? I know the acceleration would be due to gravity but...

2. Jan 16, 2012

Staff: Mentor

I would not assume that.

What electrostatic force do the two spheres exert on each other?

3. Jan 16, 2012

ypudi

Calculate Electrostatic force(F) b/w the two spheres. Since only spher 2 is free to move. the acc is F/m(of sphere 2)

4. Jan 16, 2012

hudsonale10

(9.0 x 10^9)((7.68 x 10^-6)(5.74 x 10-6))/(19.9)^2

5. Jan 16, 2012

ypudi

(19.9* 10^-2)^2 as 19.9 is in cm

6. Jan 16, 2012

ypudi

ans is 11.48 m/s^2

7. Jan 16, 2012

hudsonale10

Wow thank you for catching that simple error, and thanks for all the help

8. Jan 16, 2012