+Q +2Q Figure P15.61

Three charges are located on the corners of a right-angle triangle as in the figure. If a = 3.0 mm, b = 4.0 mm, Q = 96 %3D nC in the figure, what is the magnitude of the total electric force acting on the charge Q located at 4.0 mm from the origin on the x-axis? 2Q 3Q b= 4.0 mm Q Select one: A. 9.25 N B. 55.30 N C. 21.23 N D. 41.51 N aD3.0 mm

Two identical metal blocks resting on a frictionless horizontal surface are connected by a light metal spring having constant k = 100 N/m and unstretched length Li = 0.400 m as in Figure P15.14a. A charge Q is slowly placed on each block causing the spring to stretch to an equilibrium length L = 0.500 m as in Figure P15.14b. Determine the value of Q, modeling the blocks as charged particles.

A 4.1 MC point charge is placed on the x-axis at the point X₁ = -22.5m. A second, 2.7-MC point Charge is placed on the x-axis at the point X₂ = 10.3m. What is the x-component of the net electric field (in N/C) at the origin? (Remember that vector components can be positive or negative) N/C

A positive point charge Q is located at x-a and a negative point charge -Q is at x = -a. A positive charge q can be placed anywhere on the y-axis. Find an expression for (FX, the x -component of the net force on q. Give your answer in terms of Q, q, a, y and constant K. Do your assessment by looking at (F)x when y = 0. net net

Two small beads having positive charges q1 = 29q and q2 = q are fixed at the opposite ends of a horizontal insulating rod of length d = 1.50 m. The bead with charge q1 is at the origin. As shown in the figure below, a third small, charged bead is free to slide on the rod.   (a) At what position x is the third bead in equilibrium?x =  m(b) Can the equilibrium be stable?

Three point charges are located on a circular arc as Q2 shown in Figure P23.31. (a) What is the total electric field at P, the center of the arc? (b) Find the elec- tric force that would be exerted on a –5.00-nC point charge placed at P. +3.00 nC 4.00 cm -2.00 nC 30.0° P 30.0° 4.00 cm +3.00 nC Figure P23.31