2 3 7.[1pt] Three charges are arranged on a line as shown above. (For each state

Question

2 3 7.[1pt] Three charges are arranged on a line as shown above. (For each statement select T True, F False) A) If Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right B) If Qi is positive, Q2 is negative and Q3 is negative, then Q2 MUST feel a net force to the right C) If Q1 is negative, Q2 is negative and Qj is positive, then Q2 MUST feel a net force to the right. D) If Qi is positive, Q2 is negative and Q3 is positive, then Q2 MIGHT feel a net force to the right Correct, computer gets: FFTT Hint: OK, by now you are probably watching out for this, but note that here the syntax is TTTTF style, not "ABCF" style. Also, watch out for the wording, the first time I worked this problem I didn't notice that some of the statements say "MUST" and some say "MIGHT", there's a big difference! 8. [1pt] In the above figure, R-1.3 m, 0156x106 c, Q1 and Qs-Q1. Calculate the total force on Q2.Give your answer with a positive number for a force In the above figure, R=1.3 m, Q,-1.56x10 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. Answer: Incorrect, tries 2/6. Hint: Use Coulomb's Law and superposition of electric forces. If a force to the right is positive, what will CAPA want if the net force is leftward? Submit All Answers Last Answer: 0.02592 N

Explanation / Answer

F_total = -2 * (8.99 x 10^9 Nm^2/C^2)(1.56 x 10^-6 C)^2 / (1.3 m)^2

F_total = -2 * (8.99 x 10^9 Nm^2/C^2)(2.4336 x 10^-12 C2) / (1.69 m^2 )

F_total = -0.02592 N

I think you are not placing -ive sign before the answer that's why it's not matching.

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