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A skater will pull his/her arms in close to their body while spinning to increase the speed and force of the spin in routines this also helps to improve the fluency of the routine and is able to keep going in time to the music. They extend their arms to improve the look of the spin within a performance or routine
hope this answered your question :)
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Does the dorsal musculature of the body act to extend joints?
Yes, the doral musculature of the body acts to extend joints. For instance, the triceps extends the arms, and the paraspinal muscles extend the spine.
What galaxy arms extend from a core full of black holes?
The Milky Way galaxy has several spiral arms that extend from a central core. While the core itself contains a supermassive black hole, known as Sagittarius A*, the arms do not specifically extend from the black hole but rather spiral out from the central bulge of the galaxy.
Why do neutron star spin so rapidly?
Most stars spin (albeit is very slowly), but when the star starts to shrink it will speed up due to conservation of angular momentum. Moreover because a neutron star is so very heavy it takes a long time for it to slow down (breaking can occur via magnetic fields for example). You can test this principle yourself by sitting into an office chair, spreading your arms, and have someone give you a good whirl. You will find that while spinning you will spin faster if you pull your arms inwards and slower if you put them out again.
Which galaxy arms extend from a core full of black holes?
The Milky Way appears to have a huge (even for a black hole) gravitational object at the center of it, and this is supposed by a lot of scientists to be a black hole. The arms of our galaxy sweep around the center.
What allows you to flex and extend your lower leg and upper arms?
The muscles responsible for flexing and extending your lower leg are the quadriceps and hamstrings, while the muscles responsible for flexing and extending your upper arms are the biceps and triceps, respectively. These muscle groups work in opposition to each other to facilitate these movements.
Is angular momentum conserved when a spinning ice skater pulls in their arms?
Yes, angular momentum is conserved when a spinning ice skater pulls in their arms. This is because the skater's rotational speed increases as they bring their arms closer to their body, balancing out the decrease in their moment of inertia.
What is the angular momentum of the ice skater spinning with her arms out and not being acted upon by an external torque?
The angular momentum of the ice skater spinning with her arms out and not being acted upon by an external torque remains constant.
When a spinning skater pulls in her arms to turn fasterher angular momentum?
When a spinning skater pulls in her arms to turn faster, her angular momentum is conserved. Angular momentum is the product of an object's moment of inertia and its angular velocity. By pulling her arms in, the skater decreases her moment of inertia, causing her angular velocity to increase in order to maintain a constant angular momentum. This is similar to the principle of conservation of angular momentum seen in other rotating systems.
Which has greater rotational speed the shoulders or the fingertips of a figure skater spinning with her arms held straight out?
The fingertips of a figure skater spinning with her arms held straight out have a greater rotational speed compared to her shoulders. This is because the fingertips travel a greater distance in the same amount of time as the shoulders, leading to a higher angular velocity.
What is the best example that demonstrates the conservation of angular momentum?
One of the best examples that demonstrates the conservation of angular momentum is the spinning ice skater. When a skater pulls in their arms while spinning, their rotational speed increases due to the conservation of angular momentum. This principle shows that the total angular momentum of a system remains constant unless acted upon by an external torque.
How does a figure skater spin fast?
pull arms close to your bodykeep a 'secure' position (don't make your body 'loose')skate faster into the spinpractice
Why an ice skater extend her arms when she wants to slow down and crosses her arms when she wants to speed up?
Extending her arms creates greater air resistance, causing a greater amount of force slowing her down. Crossing her arms reduced this air resistance, lessening the force slowing her down.
Why does spinning with your arms out make you go slower?
gravity slows your body by swinging your arms
If a figure skater is spinning with her arms outstretched why will she spin faster if she brings her arms in?
The answer is related to the conservation of angular momentum. A figure skater will maintain approximately the same angular momentum during their spin (minus a negligible amount due to the friction of their skates and wind resistance). When they move their arms in, they will reduce their rotational inertia by reducing the distance of the mass of her arms and hands from the axis of rotation. In order to maintain the same angular momentum, angular rotation is increased. See the link. Its called the angular conservation of energy. No matter what the skater's position the skater produces a certain amount of energy per second. When his / her hands are extended the distance of the rotation is larger. When he pulls his hands in the weight is unchanged. TO keep the energy at the same amount the difference has to be made up by increasing the number of spins per time unit.
Why pulling your arms in causes you to go faster?
When you are spinning there is a force called angular momentum that keeps you spinning and the angular momentum forms a ratio with the size of the object that is spinning so as you bring your arms inward, your size decreases increasing your angular momentum which spins you faster.
Do push ups extend your arms?
The exercise can help build muscles in your arms, but it does not make them longer.
What causes a column of air spinning like a roll of toilet paper to turn to a vertical position?
The conservation of angular momentum causes a spinning column of air to tilt vertically. As the air moves upward, its circulation tightens, similar to a figure skater pulling in their arms to spin faster. This tightening of circulation causes the air to turn vertically.
