PPT-Rotational Equilibrium

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. Terra Alta/East Preston School. Rotational Symmetry. If, when you rotate a shape, it looks exactly the same as it did in its original position, then we say that the shape has . rotational symmetry. .. Angular displacement, angular velocity, angular acceleration. Rotational energy. Moment of Inertia. Torque. Chapter 10:Rotation of a rigid object about a fixed axis. Reading assignment:. Chapter 10.1 to10.4, 10.5 (know concept of moment of inertia, don’t worry about integral calculation), 10.6 to . - 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:. 10.1 – Angular Position (. θ. ). In linear (or translational) kinematics we looked at the position of an object (. Δx. , . Δy. , . Δd. …). We started at a reference point position (x. i. ) and our definition of position relied on how far away from that position we are.. The results from our plaid stimuli extend those from prior random-dot studies that also showed distinctions . between . these MST-mediated (. radial versus rotational) motion judgments [4-9]. . Future experiments are needed to determine whether the present task effects reflect local speed differences, which can influence radial and rotational speed judgments [10-13].. Conservation of rotational momentum. 1. Why does a wheel keep spinning. ?. Why . is a bicycle stable when it is moving, but falls over when it . stops?. Why is it difficult to change the orientation of the axis of a spinning wheel?. Ellen Akers. Radians and Degrees. In degrees, once around a circle is 360˚. In radians, once around a circle is 2. π. A radian measures a distance around an arc equal to the length of the arc’s radius. Conservation of rotational momentum. 1. Why does a wheel keep spinning. ?. Spinning ice skater . Video. . Why is a bicycle stable when it is moving, but falls over when it stops. ?. Why is it difficult to change the orientation of the axis of a spinning wheel?. © 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. Dedra. Demaree, . Georgetown University. © 2014 Pearson Education, Inc.. Rotational Motion. How can a star rotate 1000 times faster than a merry-go-round?. Why is it more difficult to balance on a stopped bike than on a moving bike?. ics. Ch 8 – Kinematics + . Ch 9 – Dynamics . Part 1 - Torque. Book Sections 9.1-9.3. Rotation. Rotation. is “spinning”. . around an axis. Rotation is different than revolution. Rotation: turning around an . 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.. . When the rates of the forward and reverse reactions become equal, the concentrations of the reactants and the products remain constant. This is the stage of chemical equilibrium. This equilibrium is .