What happens when a spinning skater draws in her outstretched arms closer to her body?

A figure skater spins, with her arms outstretched, with angular velocity of ωi. When she moves her arms close to her body, she spins faster. Her moment of inertia decreases, so her angular velocity must increase to keep the angular momentum constant.

What conservation law explains why a spinning ice skater spins faster when his Her arms are pulled in?

The conservation of angular momentum explains why ice skaters start to spin faster when they suddenly draw their arms inward, or why divers or gymnasts who decrease their moment of inertia by going into the tuck position start to flip or twist at a faster rate.

What happens when an ice skater extends her arms?

By extending her arms and one leg, a figure skater can increase her moment of inertia. If she pulls her arms and leg in closer to her rotational axis, her moment of inertia decreases. Her angular velocity (spinning speed) must therefore increase to keep her angular momentum constant.

Why does his angular velocity decrease when he raises his arms?

By easing up that centripetal force he allows his arms to move away from his torso. The motion of his arms moving away from his torso is the converse of pulling in his arms. Due to this motion of his arms (away from his torso) the mass of his arms is doing negative work, decreasing his rotational kinetic energy.

When a spinning ice skater pulls in his arms?

When a spinning ice skater pulls in his arms, he spins faster because ______. Your Answer: his angular momentum must be conserved, so reducing his radius must increase his speed of rotation.

Which quantity does not change when an ice skater pulls in her arms during a spin?

The conservation of angular momentum explains the angular acceleration of an ice skater as she brings her arms and legs close to the vertical axis of rotation. If the net torque is zero, then angular momentum is constant or conserved.

Which law explains why a skater can spin faster by pulling his arms closer to his body or spin slower by spreading his arms out?

The principle of the conservation of angular momentum holds that an object’s angular momentum will stay the same unless acted upon by an outside force. This explains why a figure skater spins faster when she tucks her arms in close to her body.

Why do you think the ice skater should start her rotation with outstretched limbs and increases her spin by pulling them in towards her body for faster rotation?

This is the result of conservation of angular momentum: as the skater reduces her rotational inertia by pulling her arms and leg in, her rotation speed must increase to maintain constant angular momentum. Angular momentum conservation plays a VERY important role in all figure skating routines.

When an ice skater is spinning on the tip of her skate and extends her arms out horizontally Her angular momentum?

Figure 11.14 (a) An ice skater is spinning on the tip of her skate with her arms extended. Her angular momentum is conserved because the net torque on her is negligibly small.

When an ice skater spins and increases her rotation rate by pulling her arms and leg in what happens to her rotational kinetic energy?

(b) Her rate of spin increases greatly when she pulls in her arms, decreasing her moment of inertia. The work she does to pull in her arms results in an increase in rotational kinetic energy. K′Rot=12I′(ω′)2.

When a twirling skater bring her arms inward her rotational inertia?

Bringing the arms inwards changes the moment of inertia of the system. The moment of inertia of the system decreases. Since angular momentum is conserved, decreasing I imply that ω should increase. The kinetic energy will also increase when rotational speed increases.

Which law explains why a skater can spin faster by pulling quizlet?

Newton’s second law of motion.