A Small metal sphere of charge 2.II] x 10\" C sits on the roof of a ill-kg cart as shown. The sphere moves toward another sphere of charge +1.5 x 1!}3 C, located on the wall. As it moves, the cart pulls a cable that passes over a pulle3...r and lit-ls an object with mass ll} kg. The cart starts at rest 5.!) m from the wall charge. (a) What is its speed 1when it is 2.1] m from the wall charge? [11} What assumptions did you malce'iI