An electrostatics lab activity uses three charged spheres (that can be modeled as point charges) to study electric forces. Spheres s₃ is placed at the origin, s₂ at x = 4.00 cm, while s₁ is placed at 8.00 cm. Spheres s₃ and s₁ have charges -4.00 nC and 6.00 nC, respectively. What is the magnitude and sign of the charge s₂ if the net force from the other charges on s₁ is zero? 

Two glass balls acquire an equal positive charge when charged by rubbing them with silk. When the balls are separated by 22.0 cm, the magnitude of the repulsive force between them is 0.320 N. Determine the charge on each sphere. 

A 1.5 g charged silicone block with a charge of -2.5 nC and a 0.5 g charged acrylic block with a charge of +4.2 nC are initially set 3.0 cm apart and permitted to move unimpeded. Compute the acceleration experienced by the silicone block.

We have three particles. One has a +3 nC charge located at the origin (point A), and another has a -5 nC charge (at point B), 3 cm away from the origin on the +x-axis. Find the distance from the origin to a point between the two particles at which a particle with a -1 nC charge experiences zero net force.

We have three small balloons with static electric charges in a square arrangement. The first, second, and third balloons have charges of -8.0 nC, 6.0 nC, and 8.0 nC respectively. Compute the magnitude and angle (clockwise or counterclockwise from the +x-axis) of the net force acting on the 6.0 nC charged balloon.

Determine the net force acting on charge M as shown below.