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Phys 221 SI Worksheet: Circular Motion Supplemental Instruction Iowa State University Leader: Course: Instructor: Date: Justin Phys 221 Adhikari 9/8/15 1. What is ω? How does it relate to θ? 2. What are the three kinds of acceleration found in circular motion problem? What values does each depend on? 3. An object has a frequency of 3rpm. What is the angular velocity in rad/s? 4. For an object with an angular velocity of 2rad/s, what radius is needed to have a tangential velocity of 3.75m/s? 5. For an object with an angular velocity of 2rad/s, what radius is needed to have a centripetal acceleration of 3.125m/s2? 6. For the same ω, how does the centripetal acceleration change when the radius is doubled? 7. For the same tangential velocity, how does the centripetal acceleration change when the radius is doubled? 8. Astronauts sit in a chair that rotates in uniform circular motion, facing the center to simulate high accelerations. If R=4m what rpm is required for the astronaut to experience 6g’s? 1060 Hixson-Lied Student Success Center 515-294-6624 [email protected] http://www.si.iastate.edu