Electrostatics. finding the resultant force

AI Thread Summary
To find the resultant force on the -2μC charge, the forces from both the 5μC and 3μC charges must be calculated using Coulomb's law, considering their respective distances. The force exerted by the 5μC charge, located 2cm away, is attractive, while the force from the 3μC charge, 4cm away, is repulsive. For the 5μC charge, the force is calculated as k * (5μC * -2μC) / (0.02m)^2, and for the 3μC charge, it is k * (3μC * -2μC) / (0.04m)^2. Similarly, the resultant force on the 5μC charge involves calculating the forces from the -2μC and 3μC charges. The calculations must be carefully checked to resolve discrepancies with the answer key.
anoel
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anyone can help me out? I've tried but my answer and answer key are differnet!

Homework Statement



three point charges lie on a straight line. find the resultant force exerted on (a) the -2\muC charge, (b) the 5 \muC charge

1 (5\muC) 2(-2\muC) 3(3 \muC)

distance b/w 1,2 = 2cm
distance b/w 2,3 = 4cm




Homework Equations



k q1 x q2 / distance^2


The Attempt at a Solution

 
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please show your attempt even if it was not correct so we can see at which step you have problem ..
 

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