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### 12 Cards in this Set

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 Angular Momentum Product of rotational inertia and rotational velocity Law of Conservation of Momentum An object or syem of objcts will maintain a constant angular momentum unles acted upon by an unbalanced external torque Lever Arm The perpendicular distance between an axis an the line of action of a force that tends to produce rotation about an axis Perturbation The deviation of an orbiting object from its path around a center of force caused by the action of an additional center of force. Rotational Velocity Rotational speed together with a direction for the axis of rotation or revolution Torque The rotational analog of force; hte product of froce and lever arm. produce rotational acceleration Inverse-Square Law A phyical quantity varies as another quantity squared. Law of Universal Gravitation For any pair of objects, each object attracts the other with a force that is directly proportional to the product of the masses of the objects, and inveresely proportionall to the square of their distances between their center of masses. Linear Momentum Product of mass and velocity of an object. Rotational Inertia The reluctance of an object to change its state of rotation, determined by the distribution of the mass of the object and the location of the axis of rotation or revolution Tangential Velocity the speed of an object moving along a circular path Universal Gravitational Constant The constant G in the equation 6.67 * 10 -11 n2 m2/kg2