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When a spinning skater pulls in her arms to turn fasterher angular momentum?
Careyscott
The reason a skater spins faster when she pulls her arms in is because of angular momentum. It is measured by mass x velocity x radius. Bringing her arms in changes her radius and velocity.
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What happens to the angular speed of a star as it shrinks?
It must spin faster in order to conserve angular momentum ... the same reason that a skater spins faster when he pulls his arms in close to his body.
Why is a tornado fast?
Tornadoes owe their extremely fast winds in part to something called the conservation of angular momentum. If something that is rotation contracts in width then the spinning must speed up, such as with a spinning ice skater pulling in her arms. Tornadoes form when a larger but less intense mass of rotating air tightens and intensifies.
Can you spin faster with your arms open?
If you've ever watched an Olympic ice skater do a spin, you may have noticed that he or she will draw in her arms closer to her body in order to increase the speed of rotation. This is in keeping with the law of the conservation of angular momentum.
What causes the air to spin so fast during a tornado?
The best way doe explain it is through a concept called the conservation of angular momentum. Most tornadoes originate from a larger but less intense rotating air mass called a mesocyclone. Under the right conditions, a portion of the mesocyclone can become narrower. As a result, the rotation speeds up. This is similar to a spinning figure skater speeding up as she pulls her arms in.
As you in-line skate around the block what action and reaction forces keep you moving?
The skater "acts" on the wheels attached to the skates, causing momentum. This momentum causes an "unbalanced force" that acts with the same amount of force, but in the opposite direction of the skater. The skater acting on the skate wheels produces an equal net force in the opposite direction, which keeps the skater moving.
What happens to the angular speed of a star as it shrinks?
It must spin faster in order to conserve angular momentum ... the same reason that a skater spins faster when he pulls his arms in close to his body.
Why is a tornado fast?
Tornadoes owe their extremely fast winds in part to something called the conservation of angular momentum. If something that is rotation contracts in width then the spinning must speed up, such as with a spinning ice skater pulling in her arms. Tornadoes form when a larger but less intense mass of rotating air tightens and intensifies.
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.
What An ice skater has a mass of 65 kg. She skates in a large circle. What would you need to know to calculate her angular momentum?
The radius of her path Her speedHer mass apex
An ice skater has a mass of 65 kg She skates in a large circle What would you need to know to calculate her angular momentum?
The radius of her path Her speedHer mass apex
How a neutron star spins so fast using the law of conservation of angular momentum?
Angular momentum is the energy of spinning objects. We can calculate the energy as the product of the mass times the "moment arm", the distance from the center of rotation tims the speed of rotation. In any closed system, angular momentum is "conserved", or remains constant.On a merry-go-round on the playground, if you get it going and then move toward the center, it speeds up a little. If you move out toward the edge, it slows down.An ice skater spins with her arms extended at a particular speed, but when she pulls in her arms, the rate of spin increases - but the angular momentum remains the same. Her hands and arms, pulled in, have a shorter "moment arm", so to keep the angular momentum constant, the speed increases.A star like our Sun spins in about 25 days. Our Sun is too small to go nova, so let's imagine a star twice as massive. If it were to go nova, about half of the mass would be blown off into space, but the remainder would be crushed into a tiny ball perhaps 20 miles in diameter. But that spinning star, with a rotation speed of perhaps 25 or 30 days, would keep a good part of the angular momentum. The star which once spun at a rate of one rotation per 25 days, with a radius of a half-million miles, now has a radius of 10 miles. So to keep the same angular momentum in such a small package, the neutron star remnant would spin much faster; probably several times per SECOND.
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.
Why does the momentum of a roller skater isn't conserved?
because
Can you spin faster with your arms open?
If you've ever watched an Olympic ice skater do a spin, you may have noticed that he or she will draw in her arms closer to her body in order to increase the speed of rotation. This is in keeping with the law of the conservation of angular momentum.
Why is the momentum of a roller skater is not conserved?
The situation is not quite clear. Total momentum is always conserved, but momentum can be transferred from one object to another.
What does a planets rotation cause?
This is a very good question that may not have an ultimate answer, but there is an explanation. The reason a planet rotates is due to its origins from the nebula from which it formed. This nebula had to be rotating. You probably have heard about the gyroscope and how it works- conservation of angular momentum. Angular momentum is determined by the rate of rotation and the mass of the object and its distribution as a function of distance from the axis of rotation. This is the principle behind an ice-skater spinning up when the arms are brought close to the body, or slowing down when the arms are extended. Except for dissipation and action of other torques, angular momentum is held constant. Thus the rotation of the gases and dust from which a planet formed causes the planet to keep on rotating, to conserve the initial angular momentum.The planet's rotation is of course changed by events both inside and outside of the planet. For example, it has been recently shown that the use of dams has changed the distribution of stored water on earth at different latitudes, sufficiently to change the length of the day! The difference is small, but has been detectable.But, why is the angular momentum conserved? And why was the nebula rotating if the universe began in a big bang?
What causes the air to spin so fast during a tornado?
The best way doe explain it is through a concept called the conservation of angular momentum. Most tornadoes originate from a larger but less intense rotating air mass called a mesocyclone. Under the right conditions, a portion of the mesocyclone can become narrower. As a result, the rotation speeds up. This is similar to a spinning figure skater speeding up as she pulls her arms in.
