When a diver gets into a tuck position by pulling in her arms and legs, she...
When a diver gets into a tuck position by pulling in her arms and legs, she increases her angular speed. Before she goes into the tuck position, her angular velocity is 5.5 rad/s, and she has a moment of inertia of 1.8 kg · m2. Once she gets into the tuck position, her angular speed is 17.1 rad/s. Determine her moment of inertia, in kg · m2, when she is in the tuck position. Assume the net torque on her is zero.
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When a diver gets into a tuck position by pulling in her arms
and legs, she...
A diver comes off a board with arms straight up and legs straight down, giving her...
A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 22 kg⋅m^2. She then tucks into a small ball, decreasing this moment of inertia to 4.2 kg⋅m^2. While tucked, she makes two complete revolutions in 2.1 s. If she did not tuck, how many revolutions would she have made in the same time?
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...
Assume an ice skater in the ending position, with arms and legs folded in, has a...
Assume an ice skater in the ending position, with arms and legs folded in, has a moment of inertia of 0.80 kg*m2. Also assume the skater starts with both arms and one leg out and has a moment of inertia in this configuration of 3.2 kg*m2. If he ends spinning at 1.3 rev/s, what is his angular speed (in rev/s) at the start?
A diver (such as the one shown in the figure(Figure 1) ) can reduce her moment of inertia by a factor of about 3.5 when...
A diver (such as the one shown in the figure(Figure 1) ) can reduce her moment of inertia by a factor of about 3.5 when changing from the straight position to the tuck position. A) If she makes 2.0 rotations in 1.5 s when in the tuck position, what is her angular speed (rev/s) when in the straight position?
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 diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotati...
A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 18kg?m2. She then tucks into a small ball, decreasing this moment of inertia to 3.6kg?m2. While tucked, she makes two complete revolutions in 1.0s . If she hadn't tucked at all, how many revolutions would she have made in the 1.8s from board to water?
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...
Emmy the trapeze artist flies through the air with her arms and legs stretched out, tumbling...
Emmy the trapeze artist flies through the air with her arms and legs stretched out, tumbling head over heels. As she rotates, she pulls her arms and legs close to her chest, as shown in the illustration As Emmy pulls her arms and legs in, how does her rotational inertia change? It increases. It decreases. It remains constant As Emmy pulls her arms and legs in, how does her angular momentum change? It increases It decreases It remains constant As...
A diver leaves the platform with her body straight. Her body is in a relatively slow...
A diver leaves the platform with her body straight. Her body is in a relatively slow rotation, with an angular speed of 4.0 rad/s. She then tucks into a pike position, with her body essentially folded in half. When straight her moment of inertia is 13.5 kg·m2, and when in the pike position it is 3.4 kg·m2. The next two questions have to do with this diver. Calculate her angular momentum when straight. a. 6 kg·m2/s b. 39 kg·m2/s c....
A competitive diver leaves the diving board and falls toward the water with her body straight and rotating slowly. She...
A competitive diver leaves the diving board and falls toward the water with her body straight and rotating slowly. She pulls her arms and legs into a tight tuck position. What happens to her angular speed? -increase -decrease -stay the same -impossible to determine What happens to the rotational kinetic energy of her body? -increase -decrease -stay the same -impossible to determine
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)...
Emmy the trapeze artist flies through the air with her arms and legs stretched out, tumbling head over heels. As she rotates, she pulls her arms and legs close to her chest, as shown in the illustration As Emmy pulls her arms and legs in, how does her rotational inertia change? It increases. It decreases. It remains constant As Emmy pulls her arms and legs in, how does her angular momentum change? It increases It decreases It remains constant As...
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