306 torque concepts

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7 Terms

1
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angular kinetics

  • study of causes of angular motion

  • cause: net torque

  • effect: angular accel

2
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angular moment of intertia

  • a resistance an object has to change in angular motion, specifically a resistance to change in a body’s angular velocity

3
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angular momentum

  • the quantity of angular motion that an object possesses

  • an object’s angular momentum is related to its moment of inertia (I) and angular velocity (W)

4
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Newton’s First Law (angular)

  • an object at rest stays at rest and an object in angular motion stays in motion with the same angular momentum unless acted upon by an unbalanced torque

  • conservation of angular momentum

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Newton’s Second Law (angular)

  • the angular accel of an object is directly proportional to the net torque exerted on it (and inversely proportional to its moment of inertia)

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most efficient way to move body

  • maximize acceleration while minimizing torque requirements

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Newton’s Third Law (angular)

  • If an object exerts a torque on another object, the other object exerts the same torque on the same object, but in the opposite direction