1. The problem statement, all variables and given/known data So in class we are learning about electric charge and we were shown a video of a small ball being attracted to a larger ball by an electric charge. We are given some data about the balls below. There are two questions associated with this problem. (we are trying to prove that the force shown from the video was to large to be a graviational pull, and thus it is a electrical force) 1. Calculate the attractive gravitational force that the spheres exert on one another. 2. Calculate the actual force that is being exerted on the small ball by the large ball to pull it away from vertical by the angle shown in the diagram. (diagram is just a small ball on rope being attracted to a bigger ball) 2. Relevant equations Mass of Big ball = 150g Radius of Big ball = 10.0cm Mass of Small ball = 0.05 g Radius of Small ball = 0.5cm 3. The attempt at a solution I know how to do the first problem, what im having problem is understanding the second problem. There is no force besides electronic force acting on it, correct? What equation do i use. please help me in the correct direction. any help is greatly appreciated.