A ballet student with her arms and a leg extended spins with an initial rotational speed...
A ballet student with her arms and a leg extended spins with an initial rotational speed of .80 rev/s. as she draws her arms and leg towards her body, her rotational inertia becomes .80 kg*m^2, and her rotational velocity is 4.1 rev/s. Determine her initial rotational inertia. Covert from rev/s to rad/s.
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A ballet student with her arms and a leg extended spins with an
initial rotational speed...
1) A student sitting on a chair on a circular platform of negligible mass rotates freely...
1) A student sitting on a chair on a circular platform of negligible mass rotates freely on an air table at initial rotational speed 2.3 rad/s. The student's arms are initially extended with 6.0-kg dumbbells in each hand. As the student pulls her arms in toward her body, the dumbbells move from a distance of 0.80 m to 0.10 m from the axis of rotation. The initial rotational inertia of the student's body (not including the dumbbells) with arms extended...
An ice skater spins, with her arms and one leg outstretched, and achieves an angular velocity...
An ice skater spins, with her arms and one leg outstretched, and achieves an angular velocity of 2 rad/s. when she pulls in her arms, her moment of inertia decreases to 65% its original value. what is her new angular velocity?
1. An ice skater spins on the ice with her arms positioned tight against her body....
1. An ice skater spins on the ice with her arms positioned tight against her body. In this position, she has a moment of inertia of 1.3 kg m2 and an angular speed of 15 rad/s. If the ice skater then stretches out her arms, and her angular speed slows to 6.0 rad/s, what is her moment of inertia with her arms outstretched? 3.64 kg m2 4.91 kg m2 3.25 kg.m2 4.39 kg m2 6.11 kg m2 А В С...
A person spins with their arms extended at an angular velocity of 4 radians/second. When they...
A person spins with their arms extended at an angular velocity of 4 radians/second. When they bring their arms in, their angular velocity becomes 9 radians/second. Their moment of inertia with arms extended was I. What is the skater's moment of inertia with her arms drawn in?
The 160 lb ice skater with arms extended horizontally spins about a vertical axis with a...
The 160 lb ice skater with arms extended horizontally spins about a vertical axis with a rotational speed of 1 rev/sec. Estimate his rotational speed if he fully retracts his arms, bringing his hands very close to the centerline of his body. As a reasonable approximation, model the extended arms as uniform slender rods, each of which is 27 in. long and weighs 13 lb. Model the torso as a solid 134-lb cylinder 13 in. in diameter. Treat the man...
Question 8 (6 points) A 60.0-kg skater is spinning at 0.800 rev/s with her arms and...
Question 8 (6 points) A 60.0-kg skater is spinning at 0.800 rev/s with her arms and legs extended outward. In this position her moment of inertia with respect to the vertical axis about which she is spinning is 6.00 kg•m?. She pulls her arms and legs in close to her body changing her moment of inertia to 2.00 kg•m². What is her final angular velocity in rad/s? a) 8.71 rad/s b) 15.1 rad/s c) 2.40 rad/s d) 0.800 rad/s e)...
A ballerina spins on her toe, essentially without friction. She starts the spin with her arms...
A ballerina spins on her toe, essentially without friction. She starts the spin with her arms extended outward from her body. When she brings her arms up, closer to her axis of rotation, which of the following occurs. A: She increases her moment of inertia, thereby increasing her angular speed B: She increases her moment of inertia, thereby decreasing her angular speed C: She decreases her moment of inertia, thereby increasing her angular speed D: She decreases her moment of...
A figure skater spins with her arms outstretches at a rate of 10 rev/s. When she...
A figure skater spins with her arms outstretches at a rate of 10 rev/s. When she pulls her arms closer to her body, her moment of inertial about the spin axis decreased by 10%, what is the skaters new rotational rate in rev/sec?
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...
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a rotational inertia Ii = 2.30 kg.m...
An ice- skater is initially spinning at an angular speed ω = 1.35 revolutions/s with a rotational inertia Ii = 2.30 kg.m2 with her arms extended. When she pulls her arms in, her rotational inertia is reduced to If=1.05 kg.m2 . Assume no external torques act. a) Determine her initial angular speed in rad/s. (1 marks) b) Calculate her final angular speed in RPM (4 marks) c) Calculate the period of rotation when she is at her final speed (1...
1. An ice skater spins on the ice with her arms positioned tight against her body. In this position, she has a moment of inertia of 1.3 kg m2 and an angular speed of 15 rad/s. If the ice skater then stretches out her arms, and her angular speed slows to 6.0 rad/s, what is her moment of inertia with her arms outstretched? 3.64 kg m2 4.91 kg m2 3.25 kg.m2 4.39 kg m2 6.11 kg m2 А В С...
Question 8 (6 points) A 60.0-kg skater is spinning at 0.800 rev/s with her arms and legs extended outward. In this position her moment of inertia with respect to the vertical axis about which she is spinning is 6.00 kg•m?. She pulls her arms and legs in close to her body changing her moment of inertia to 2.00 kg•m². What is her final angular velocity in rad/s? a) 8.71 rad/s b) 15.1 rad/s c) 2.40 rad/s d) 0.800 rad/s e)...
A figure skater spins with her arms outstretches at a rate of 10 rev/s. When she pulls her arms closer to her body, her moment of inertial about the spin axis decreased by 10%, what is the skaters new rotational rate in rev/sec?
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