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Emmy the trapeze artist flies through the air with her arms and legs stretched out, tumbling...
A dancer girl is rotating over a turntable with her arms out stretched. If she lowers...
A dancer girl is rotating over a turntable with her arms out stretched. If she lowers her arms, how does this affect her motion? Her spinning rate increases because her moment of inertia decreases. Her spinning rate decreases because her moment of inertia decreases. Her spinning rate remains the same because her moment of inertia doesn't change. Her spinning rate decreases because her moment of inertia increases. Her spinning rate increases because her moment of inertia increases.
A trapeze artist jumps from her trapeze and spins through the air in a tuck position....
A trapeze artist jumps from her trapeze and spins through the air in a tuck position. As she moves through the air without changing her body position, which of the following are conserved? Select all that apply. -angular momentum -potential energy -linear velocity -linear momentum -angular velocity -kinetic energy
4 A ballerina is spinning on one foot with her arms stretched out, when she pulls...
4 A ballerina is spinning on one foot with her arms stretched out, when she pulls her arms in. Will the following quantities increase, decrease or remain unchanged? (Ignore air drag) (i) Her angular speed. Increase (ii) Her moment of inertia. Decrease (iii) Her angular momentum. Increase (iii) Her rotational kinetic energy. Increase. K1 = 1/2 I1ω1 ; K2 = 1/2 I2ω2 . Because I1ω1 = I2ω2 , it follows K2 = (1/2 I1ω1)(I1/I2) = K1(I1/I2) > K1 THE ANSWERS...
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...
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 50.0kg mass skater with her arms stretched out giving her a radius of 0.9m is...
A 50.0kg mass skater with her arms stretched out giving her a radius of 0.9m is spinning with an angular velocity of 15 rad/s. If she pulls her arms close to her body her new radius is 0.30m, what is her new angular velocity?
A 50.0kg mass slater with her arms stretched out giving her a radius of 0.9m is...
A 50.0kg mass slater with her arms stretched out giving her a radius of 0.9m is spinning with an angular velocity of 15 rad/s. If she pulls her arms close to her body her new radis is 0.30m. What is her new angular velocity?
A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 12
A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 12. By what factor does her rotational Kinetic energy change?
A ballerina is performing a solo for The Nutcracker. Halfway through, she begins to spin at...
A ballerina is performing a solo for The Nutcracker. Halfway through, she begins to spin at 0.5rev/s on her toes with her arms stretched out from her sides, with a moment of inertia of 1.9kgm2. She then pulls her arms to her chest, spinning at 1.3rev/s. What is her moment of inertia when she brings her arms to her chest? (Hint: You may leave the angular velocities in the units given of revolutions/second. Whether you keep them this way or...
A uniform rod rotates in a horizontal plane about a vertical axis through one end. The...
A uniform rod rotates in a horizontal plane about a vertical
axis through one end. The rod is 12.00 m long, weighs
20.00 N, and rotates at 350 rev/min clockwise when seen
from above. Calculate its rotational inertia about the axis of
rotation.
Tries 0/5
Calculate the angular momentum of the rod about that axis.
A man stands at the center of a platform that rotates without
friction with an angular speed of 1.2 rev/s. His arms are
outstretched, and...
A dancer girl is rotating over a turntable with her arms out stretched. If she lowers her arms, how does this affect her motion? Her spinning rate increases because her moment of inertia decreases. Her spinning rate decreases because her moment of inertia decreases. Her spinning rate remains the same because her moment of inertia doesn't change. Her spinning rate decreases because her moment of inertia increases. Her spinning rate increases because her moment of inertia increases.
A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 12. By what factor does her rotational Kinetic energy change?
A uniform rod rotates in a horizontal plane about a vertical
axis through one end. The rod is 12.00 m long, weighs
20.00 N, and rotates at 350 rev/min clockwise when seen
from above. Calculate its rotational inertia about the axis of
rotation.
Tries 0/5
Calculate the angular momentum of the rod about that axis.
A man stands at the center of a platform that rotates without
friction with an angular speed of 1.2 rev/s. His arms are
outstretched, and...
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