7) Two point charges are on the x-axis. One charge, q1= 10.0 nC, is located at t

Question

7) Two point charges are on the x-axis. One charge, q1= 10.0 nC, is located at the origin, and the other charge, q2=1 8.0 nC, is located at x = 9.00 m. What is the force on q2 ? 10) Three point charges are positioned as follows: q1 is at (0.00 m, 0.00), q2 is at (1.20 m, 0.00 m), and q3 is at (1.20 m, 1.60 m). If all three charges are negative, into which quadrant is the force on q1 pointing? 7) Two point charges are on the x-axis. One charge, q1= 10.0 nC, is located at the origin, and the other charge, q2=1 8.0 nC, is located at x = 9.00 m. What is the force on q2 ? 10) Three point charges are positioned as follows: q1 is at (0.00 m, 0.00), q2 is at (1.20 m, 0.00 m), and q3 is at (1.20 m, 1.60 m). If all three charges are negative, into which quadrant is the force on q1 pointing?

Explanation / Answer

7) Two point charges are on the x-axis. One charge, q1= 10.0 nC, is located at the origin, and the other charge, q2=1 8.0 nC, is located at x = 9.00 m. What is the force on q2 ? Use F=kq1q1/r^2 k is coulomb's constant:9x10^9nm^2/C^2 F=(9x10^9)(10x10^-9)(18x10^-9)/(9^2)=2x10^-8N 10) Three point charges are positioned as follows: q1 is at (0.00 m, 0.00), q2 is at (1.20 m, 0.00 m), and q3 is at (1.20 m, 1.60 m). If all three charges are negative, into which quadrant is the force on q1 pointing? Since all of the charges are negative, q1 will want to repel q2 and q3. This means that it will exert a force towards them (pushing them away). So q1 will exert a force into quadrant I.

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