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## Chapter 13

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**The fan blade is slowing down. What are the signs of**1. 2. 3. 4.**The fan blade is slowing down. What are the signs of**1. 2. 3. 4.**Rank in order, from largest to smallest, the five torques**The rods all have the same length and are pivoted at the dot. 1. 2. 3. 4. 5.**Rank in order, from largest to smallest, the five torques**The rods all have the same length and are pivoted at the dot. 1. 2. 3. 4. 5.**Rank in order, from largest to smallest, the angular**accelerations 1. 2. 3. 4. 5.**Rank in order, from largest to smallest, the angular**accelerations 1. 2. 3. 4. 5.**Four Ts are made from two identical rods of equal mass and**length. Rank in order, from largest to smallest, the moments of inertia Ia to Id for rotation about the dotted line. 1. Ic > Ib > Id > Ia 2. Ic = Id > Ia = Ib 3. Ia = Ib > Ic = Id 4. Ia > Id > Ib > Ic 5. Ia > Ib > Id > Ic**Four Ts are made from two identical rods of equal mass and**length. Rank in order, from largest to smallest, the moments of inertia Ia to Id for rotation about the dotted line. 1. Ic > Ib > Id > Ia 2. Ic = Id > Ia = Ib 3. Ia = Ib > Ic = Id 4. Ia > Id > Ib > Ic 5. Ia > Ib > Id > Ic**A student holds a meter stick straight out with one or more**masses dangling from it. Rank in order, from most difficult to least difficult, how hard it will be for the student to keep the meter stick from rotating. 1. c > d > b > a 2. b = c = d > a 3. c > b > d > a 4. b > d > c > a 5. c > d > a = b**A student holds a meter stick straight out with one or more**masses dangling from it. Rank in order, from most difficult to least difficult, how hard it will be for the student to keep the meter stick from rotating. 1. c > d > b > a 2. b = c = d > a 3. c > b > d > a 4. b > d > c > a 5. c > d > a = b**Two buckets spin around in a horizontal circle on**frictionless bearings. Suddenly, it starts to rain. As a result, 1. The buckets slow down because the angular momentum of the bucket + rain system is conserved. 2. The buckets continue to rotate at constant angular velocity because the rain is falling vertically while the buckets move in a horizontal plane. 3. The buckets continue to rotate at constant angular velocity because the total mechanical energy of the bucket + rain system is conserved. 4. The buckets speed up because the potential energy of the rain is transformed into kinetic energy. 5. None of the above.**Two buckets spin around in a horizontal circle on**frictionless bearings. Suddenly, it starts to rain. As a result, 1. The buckets slow down because the angular momentum of the bucket + rain system is conserved. 2. The buckets continue to rotate at constant angular velocity because the rain is falling vertically while the buckets move in a horizontal plane. 3. The buckets continue to rotate at constant angular velocity because the total mechanical energy of the bucket + rain system is conserved. 4. The buckets speed up because the potential energy of the rain is transformed into kinetic energy. 5. None of the above.**Chapter 13**Reading Quiz**A new way of multiplying two vectors is introduced in this**chapter. What is it called? 1. Dot Product 2. Scalar Product 3. Tensor Product 4. Cross Product 5. Angular Product**A new way of multiplying two vectors is introduced in this**chapter. What is it called? 1. Dot Product 2. Scalar Product 3. Tensor Product 4. Cross Product 5. Angular Product**Moment of inertia is**1. the rotational equivalent of mass. 2. the point at which all forces appear to act. 3. the time at which inertia occurs. 4. an alternative term for moment arm.**Moment of inertia is**1. the rotational equivalent of mass. 2. the point at which all forces appear to act. 3. the time at which inertia occurs. 4. an alternative term for moment arm.**A rigid body is in equilibrium if**1. 2. 3. neither 1 nor 2. 4. either 1 or 2. 5. both 1 and 2.**A rigid body is in equilibrium if**1. 2. 3. neither 1 nor 2. 4. either 1 or 2. 5. both 1 and 2.