Question

Review Part A You have a lightweight spring whose unstretched length What is the magnitude of the charge (in nC) on each bead? Express your answer using two significant figures is 4.0 cm. First, you attach one end of the spring to the ceiling and hang a 2.4 g mass from it. This stretches the spring to a length of 5.3 cm. You then attach two small plastic beads to the opposite ends of the spring, lay the spring on a frictionless table, and give each plastic bead the same charge. This stretches the spring to a length of 4.4 cm nC Submit Provide Feedback

Answer 1

The spring constant is, F-k(x-L) 2.4×10% )(9.8) 53x10-2-4.0×10-2 1.809 Nm The charge is, (1.809)(5.3×10-2-40x10-2)(4×10-2 = 6.46×10-8 C -64.6×10° C 65 nC The net force on q2 is, 12 12 5.6×10-9 0.2 = 5.6× 10-7 (0.2) fi = 2.24×10-8 C =22.4×10-9 C 22 nC