14. [-/1 Points] DETAILS SERPSE10 22.A.P.032. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small sphere of charge q, = 0.792 MC hangs from the end of a spring as in Figure a. When another small sphere of charge q, = -0.552 ,C is held beneath the first sphere as in Figure b, the spring stretches by d = 3.18 cm from its original length and reaches a new equilibrium position with a separation between the charges of r = 5.40 cm. What is the force constant of the spring? N/m 91 92 a b Need Help? Read It13. [-/3 Points] DETAILS SERPSE10 22.A.P.031. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small block of mass m and charge Q is placed on an insulated, frictionless, inclined plane of angle 0 as in the figure below. An electric field is applied parallel to the incline. e (a) Find an expression for the magnitude of the electric field that enables the block to remain at rest. (Use any variable or symbol stated above along with the following as necessary: g for the acceleration due gravity.) E = (b) If m = 5.26 9, Q = -6.79 UC, and 0 = 26.90, determine the magnitude and the direction of the electric field that enables the block to remain at rest on the incline. magnitude N/C direction ---Select--- Need Help? Read It