Question Completion Status: QUESTION 2 In the following image of the ball rolling down a hill, which of the following best describes the main energy conversion taking place? O The gravitational potential energy at the top of the hill is converted to electrical energy as the ball moves down the hill. The elastic potential energy at the top of the hill is converted to thermal energy as the ball picks up speed on the way down the hill. The elastic potential energy at the top of the hill is converted to kinetic energy of motion as the ball moves down the hill. The gravitational potential energy at the top of the hill is converted to kinetic energy of motion as the ball moves down the hill