Chapter+9+Circular+Motion

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Rotation is when object runs about an internal axis "that is, an axis located within the body of the object" the motion Revolution Is when an object turns about an external axis motion Axis Is the straight line around which rotational takes place Linear Speed Distance moved per unit of time Tangential Speed speed of something moving along a cicular path is usually called this because it always tangent to the circular path Rotation Speed is the number of rotations per units of time Tangential speed is directly inproportional to Radial speed time rotational speed Centripetal Force Any force that cause an object to follow a circular path in any system. Centrifugal Force the outward force in circular motion. Rotation Interia any resistance of an object to change in its rotational motion Linear momentum a rotating objects that has an "interia of motion" or momentum Angular Momentum the "interia of rotation" of a rotating object Rotational Velocity When a diection is assign to a rotational speed is rotational velocity Angular momentum = Rotational Interia times Rotational Velocity Linear Momentum = mass times velocity Law of Conservation of Angular Momentum is "If no unbalanced external torque acts on a rotatong system, the angular momentum of that system is constant"