PPT-An object will remain in rotational equilibrium if its center of mass is above the area

What determines whether an object will rotate when a force acts on it Why doesnt the Leaning Tower of Pisa rotate and topple over What maneuvers does a falling cat make to land on its feet . Today. Finish . last slides on energy from last time. Start lecture on Rotation (Chapter 8). Looking . ahead: . On Oct 9 . is the first midterm! Will be on . Chs. . 2,3,4,5,6,7,8. . . On Oct 6, will be a review session.. We consider the rotation of . rigid bodies. . A rigid body is an extended object (as opposed to a point object) in which the mass is distributed spatially.. Where should a force be applied to make it . - Class. . 20. Today:. Gravitational Torque. Rotational Kinetic Energy. Rolling without Slipping. Equilibrium with Rotation. Rotation Vectors. Angular Momentum. Pre-class reading quiz on Chapter 12. 11.1 - Torque. Increased Force = Increased Torque. Increased Radius = Increased Torque. 11.1 - . Torque. Only the tangential component of force causes a torque:. 11-1 Torque. This leads to a more general definition of torque:. Physics 1, NTC. Angular Motion, General Notes. When a rigid object rotates about a fixed axis in a given time interval, every portion on the object rotates through the same angle in a given time interval and has the same angular speed and the same angular acceleration.. Torque. Center of Mass. When analyzing the motion of an extended object, we treat the entire object as if its mass were contained in a single point, known as the object’s . center of mass (CM).. Mathematically, the CM of an object is the weighted average of the location of the mass in an object.. © 2015 Pearson Education, Inc.. This lecture will help you understand:. Circular Motion . Rotational Inertia. Torque. Center of Mass and Center of Gravity. Centripetal Force. Centrifugal Force. Rotating Reference Frames. We consider the rotation of . rigid bodies. . A rigid body is an extended object (as opposed to a point object) in which the mass is distributed spatially.. Where should a force be applied to make it rotate?. If you ride near the outside of a merry-go-round, do you go faster or slower than if you ride near the middle?. It depends on whether “faster” means . a faster . linear speed (= speed). , ie more . We consider the rotation of . rigid bodies. . A rigid body is an extended object in which the mass is distributed spatially.. Where should a force be applied to make it rotate (spin)? The same force applied at . Rotational Equilibrium and Dynamics Chapter 8 Magnitude of a Torque What is a torque? A quantity that measures the ability of a force to rotate an object around some axis. r  Example… Imagine opening a door around a hinge. Today:. Gravitational Torque. Rotational Kinetic Energy. Rolling without Slipping. Equilibrium with Rotation. Rotation Vectors. Angular Momentum. Pre-class reading quiz on Chapter 12. Last day I asked at the end of class:. Conditions . for . Static Equilibrium. Center . of Gravity. Static . Equilibrium Problems. S. tability. Last day I asked. The supports to the diving board provide a vertical force on the board so the diver will not fall. What are the directions of the force on the board at point 1 and point 2: up or down? Why?. Note, all lectures and pre-lectures posted up as always at. http://www.hunter.cuny.edu/physics/courses/physics100/spring-2016. Looking ahead. : Sep 27, Review (. Chs. 2,3,4,5,6,7,8). Sep 30: Midterm .