As part of a classroom demonstration, a student is sitting on a pedestal that can freely...
As part of a classroom demonstration, a student is sitting on a pedestal that can freely rotate and is holding onto a set of masses. The student has an initial rotational velocity of 9.9 rad/s and his arms are held inward, giving him a rotational inertia of 1.6 kg·m². He then extends his arms outward from his body, increasing his rotational inertia to 4.3 kg·m². What will be his new rotational velocity?
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As part of a classroom demonstration, a student is sitting on a
pedestal that can freely...
A student, sitting on a stool, holds masses in each hand. When his arms are extended,...
A student, sitting on a stool, holds masses in each hand. When his arms are extended, the total rotational inertia of the system is 5.6 kg·m2. When he pulls his arms in close to his body, he reduces the total rotational inertia to 1.4 kg·m2. When he is rotating with his hands held close to his body, his rotational velocity is 9 RPM. If there are no external torques, calculate the new rotational velocity of the system when he extends...
A student, sitting on a stool rotating at a rate of 26 rev/min, holds masses in...
A student, sitting on a stool rotating at a rate of 26 rev/min, holds masses in each hand. When his arms are extended, the total rotational inertia of the system is 8.8 kg · m2. He pulls his arms in close to his body, reducing the total rotational inertia to 5.1 kg ·m2 . External torques are negligible. The new rotational speed of the system is
1) Consider a system consisting of your instructor sitting on a stool while holding weights in...
1) Consider a system consisting of your instructor sitting on a stool while holding weights in his hands. The stool can spin; it rotates at a rate of 26 RPM. The instructor holds masses in each hand. When his arms are fully extended, the total rotational inertia of the system is 4.5 kg · m2. He then moves his arms close to his body, reducing the total rotational inertia to 1.5 kg · m2. If there are no external torques,...
A student sits on a freely rotating stool holding two weights, each of mass 3.08 kg....
A student sits on a freely rotating stool holding two weights, each of mass 3.08 kg. When his arms are extended horizontally, the weights are 0.91 m from the axis of rotation and he rotates with an angular speed of 0.755 rad/s. The moment of inertia of the student plus stool is 3.08 kg·m2 and is assumed to be constant. The student pulls the weights inward horizontally to a position 0.294 m from the rotation axis. (a) Find the new...
A student holding two dumbbells against his chest stands on a turntable while two other His...
A student holding two dumbbells against his chest stands on a turntable while two other His rotational inertia in this position is 18.8 kg m2. If the student on the turntable is initially rotating at 2.15 rad/s and then extends his arms so that his rotational inertia increases by 33.2%, what is his new rotational speed?
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.99 kg...
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.99 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.09 m from the axis of rotation and the student rotates with an angular speed of 0.752 rad/s. The moment of inertia of the student plus stool is 2.80 kg . m and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.293 m...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.04 kg...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.04 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.02 m from the axis of rotation and the student rotates with an angular speed of 0.743 rad/s. The moment of inertia of the student plus stool is 2.58 kg .m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.294 m from...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.05 kg...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.05 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 0.96 m from the axis of rotation and the student rotates with an angular speed of 0.757 rad/s. The moment of inertia of the student plus stool is 2.68 kg m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.291 m from...
3. A student sits on a freely rotating stool holding two dumbbells, each of mass 2.92...
3. A student sits on a freely rotating stool holding two dumbbells, each of mass 2.92 kg. When his arms are extended horizontally, the dumbbells are 0.95 m from the axis of rotation and the student rotates with an angular speed of 0.754 rad/s. The moment of inertia of the student plus stool is 2.69 kg · m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.305 m from the rotation axis....
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.04 kg...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.04 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.08 m from the axis of rotation and the student rotates with an angular speed of 0.755 rad/s. The moment of inertia of the student plus stool is 2.59 kg · m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.306 m...
A student holding two dumbbells against his chest stands on a turntable while two other His rotational inertia in this position is 18.8 kg m2. If the student on the turntable is initially rotating at 2.15 rad/s and then extends his arms so that his rotational inertia increases by 33.2%, what is his new rotational speed?
A student sits on a freely rotating stool holding two dumbbells, each of mass 2.99 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.09 m from the axis of rotation and the student rotates with an angular speed of 0.752 rad/s. The moment of inertia of the student plus stool is 2.80 kg . m and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.293 m...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.04 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 1.02 m from the axis of rotation and the student rotates with an angular speed of 0.743 rad/s. The moment of inertia of the student plus stool is 2.58 kg .m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.294 m from...
A student sits on a freely rotating stool holding two dumbbells, each of mass 3.05 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 0.96 m from the axis of rotation and the student rotates with an angular speed of 0.757 rad/s. The moment of inertia of the student plus stool is 2.68 kg m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.291 m from...
3. A student sits on a freely rotating stool holding two dumbbells, each of mass 2.92 kg. When his arms are extended horizontally, the dumbbells are 0.95 m from the axis of rotation and the student rotates with an angular speed of 0.754 rad/s. The moment of inertia of the student plus stool is 2.69 kg · m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.305 m from the rotation axis....
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