ROTATIONAL MOTION Activity 1. Moment of Inertia Directions: Read, analyze, and answer the following questions below. 1. What is the moment of inertia formula for an object of mass M if it is a: A. thin hoop of radius R B. solid cylinder of radius R C. uniform sphere of radius R D. long uniform rod of length L around the end E. long uniform rod of length L with an axis through the center 2. Compute the moment of the inertia for each of the shapes in the above problem given that they all have a mass of 5.0 kg and a radius (or length) of 2.0 meters. Include units. A. B. C. D. E. 3. Which of the above shapes would be the easiest to start or stop rotating? 4. Why is the thin hoop the most difficult to rotate