Three charges are arranged on a line as shown above. If Q1 is positive, Q2 is ne

Question

Three charges are arranged on a line as shown above. If Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MIGHT feel a net force to the right. If Q1 is positive, Q2 is negative and Q3 is negative, then Q2 MUST feel a net force to the right. If Q1 is negative, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right. If Q1 is positive, Q2 is negative and Q3 is positive, then Q2 feel a net force to the right. Tries 0/20 In the above figure, R=1.50 m, Q1 =1.39.10-6 C, Q2=-Q1 and Q3=-Q1. Calculate the total force on Q2. Give your answer with a positive number for a force directed to the right.

Explanation / Answer

1) if q1 is positive and q2 negative, q2 feels a force to the left (attractive) q3 is positive and q2 is negative so q2 feels a force to the right (attractive) since we dont know the signs must is not true so false 2) still a force to the left from q1 but now q3 is negative so its force is to left so it will feel a force to left so not a force to right so false 3) same as part 1 we dont know so it might be to the right, so true 4) q1 and q2 same charge so repulsive, so this is to right q3 is positive so opposites attract so force to right so net force is to the right, so true

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