Mastery Quiz (See related pages) 1 In the case of rotational motion the angular velocity for points on the object A) increase as the distance from the pivot point is increased B) decrease as the distance from the pivot point Increases C) are all the same regardless of the distance from the pivot point 2 The correct units for describing rotational velocity in physics are A) m/s B) rev/s C) degrees/s D) rad/s 3 Torque is calculated as A) the applied force times the lever arm B) the applied force divided by the lever arm C) the applied force times the square of the lever arm 4 The point in or near an object about which the weight of the object itself exerts no net torque is the A) fulcrum B) center of gravity C) impulse point 5 If the distance between a point mass and the pivot point is doubled, the moment of inertia of the object about that point is multiplied by A) 4 B) 2 C) 0.5 D) 0.25 6 Angular momentum is calculated as the A) product of mass times velocity B) product of mass times angular velocity C) product of moment of inertia times velocity D) product of moment of inertia times angular velocity 7 Angular momentum is conserved A) in all cases B) only when the net force acting on the system is zero C) only when the angular velocity is zero D) only when the net torque acting on the system is zero 8 Kepler's Second Law is a direct consequence of A) Newton's First Law B) the principle of conservation of momentum C) the principle of conservation of angular momentum D) Newton's Third Law 9 If two children sit on a seesaw and one is twice as heavy as the other, in order to achieve balance the lighter child must sit A) half as far from the fulcrum B) twice as far from the fulcrum C) the same distance from the fulcrum D) four times as far from the fulcrum 10 When an ice skater, who is spinning with his/her arms outstretched, draws his/her arms close to his/her body the rate of spin A) decreases B) does not change C) increases
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