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Why does a spinning ice skater pull her arms close and extend them?
Wiki User
∙ 14y ago
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 :)
Wiki User
∙ 14y ago
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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?
Neutron stars spin rapidly due to the conservation of angular momentum. When a massive star collapses into a neutron star, its rotation speed increases dramatically due to the conservation of angular momentum, just like a figure skater spinning faster when they pull their arms in. Additionally, the rapid rotation can be sustained by the incredibly high density and strong gravitational forces present in neutron stars.
Which galaxy arms extend from a core full of black holes?
The Milky Way galaxy has arms that extend from a central region containing a supermassive black hole known as Sagittarius A*. This central region is surrounded by stars and dust that make up the galactic core.
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.
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. This conservation principle dictates that as she decreases her moment of inertia by bringing her arms closer to her body, her angular velocity increases to compensate, resulting in a faster spin.
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.
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 slows down the skater by increasing air resistance, which helps reduce her speed. Cross her arms reduces air resistance, allowing her to move faster due to less drag. These actions take advantage of physics principles to control her velocity on the ice.
Why are tornadoes so violent?
Tornadoes are violent due to the rapid rotation of air within the storm system, creating strong winds that can reach speeds over 200 mph. The intense pressure differences and wind shear in the storm also contribute to their destructive power. Additionally, the interaction between warm, moist air and cool, dry air can fuel the storm's intensity.
Why is a tornado fast?
A tornado is fast due to the strong rotational forces generated within thunderstorms. The combination of updrafts and downdrafts within the storm system creates a rapidly rotating column of air, resulting in the high wind speeds associated with tornadoes.
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 happens to the speed of a spinning mass of gas when it contracts?
When a spinning mass of gas contracts, its speed of rotation will increase due to the conservation of angular momentum. This is similar to how a figure skater spins faster when they pull in their arms. As the gas cloud contracts, it spins faster to maintain its momentum.
How the earth rotates?
The Earth spins on its axis because of conservation of angular momentum. The classic example of this is a figure skater. When a figure skater pulls in her arms, she spins faster. The Earth formed when gas left over from making the Sun condensed into the planets. As this gas cooled and condensed, it started to spin faster. Now that it is spinning (and not condensing any more), it will keep spinning at a steady rate unless something stops.
