1. The problem statement, all variables and given/known data Two thin hollow plastic spheres, about the size of a ping-pong ball with masses (m1=m2 = 2e-3 kg) have been rubbed with wool. Sphere 1 has a charge q1 = -4e-9 C and is at location < 40e-2, -20e-2, 0 > m. Sphere 2 has a charge q2 = -6e-9 C and is at location < -50e-2, 40e-2, 0> m I've already calculated Relative Position Vector: <-90e-2, 60e-2, 0> Distance between q1 and q2: 1.0816653 m Unit Vector: <-.8320502943, .5547001962, 0> Magnitude of gravitational force exerted on q2 by q1: 2.29059829e-16 The Electrostatic Force between the two objects: 1.84615e-7 Questions: 1) What is the gravitational force (vector) exerted on q2 by q1? 2) What is the electric force (vector) exerted on q2 by q1? 2. Relevant equations Fnet = G * [(m1 * m2)/r^2] Felec = k * [(q1 * q2)/r^2] 3. The attempt at a solution For question 1, I took each separate component of the unit vector and divided it by the magnitude. i.e. <(-.8320502943 / 2.29059829e-16), (.5547001962 / 2.29059829e-16), 0> For question 2, I didn't know where to start, assuming I needed the answer to question 1.