The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q₁ = +12.0 μC; the other two have identical magnitudes, but opposite signs: 42 = -3.75 μC and 43 = +3.75 μC. (a) Determine the net force exerted on 91 by the other two charges. (b) If q₁ had a mass of 1.50 g and it were free to move, what would be its acceleration? (a) Number 1.30 m 23.0 23.0 1.30 Units N (b) Number ! Units m/s^2 (a) There are two electrostatic forces acting on ₁; that due to q, and that due to g,. The magnitudes of these forces can be found using Coulomb's law. The magnitude and direction of the net force on &, can be found using the method of vector components. Sketch the situation and draw two arrows that represent the two forces on q₁. Recall that like charges repel and opposite charges attract. Note that by symmetry, the magnitude of these two forces are the same and their x components cancel. (b) According to Newton's second law (equation 4.2b), acceleration equals the net force divided by the mass.

The drawing shows three point charges fixed in place. The charge at the coordinate origin has a value of q₁ = +12.0 μC; the other two have identical magnitudes, but opposite signs: 42 = -3.75 μC and 43 = +3.75 μC. (a) Determine the net force exerted on 91 by the other two charges. (b) If q₁ had a mass of 1.50 g and it were free to move, what would be its acceleration? (a) Number 1.30 m 23.0 23.0 1.30 Units N (b) Number ! Units m/s^2 (a) There are two electrostatic forces acting on ₁; that due to q, and that due to g,. The magnitudes of these forces can be found using Coulomb's law. The magnitude and direction of the net force on &, can be found using the method of vector components. Sketch the situation and draw two arrows that represent the two forces on q₁. Recall that like charges repel and opposite charges attract. Note that by symmetry, the magnitude of these two forces are the same and their x components cancel. (b) According to Newton's second law (equation 4.2b), acceleration equals the net force divided by the mass.