If an ice skater is spinning will she spin faster or slower with her arms closer to her body?

Question

but why does it make you spin faster?

Answer 1

faster

Answer 2

You will spin faster because of centripital force.

Answer 3

faster.

the force that you used to make your arms go in make you go around and around

Answer 4

faster.  you are tighter.

less air resistance.

Answer 5

Faster. Tucking her arms in will lessen the wind resistance. Putting her arms out slows her down because there is more wind resistance.

Answer 6

The closer your arms are into your body the faster your will spin, this has to do with centripetal force, and drag.

Answer 7

faster because it gives her more momentum

Answer 8

Faster.  Centrifugal force decreases with less outward opposition.  Take for instance a wheel.  Smaller tires spin at a much higher rate of speed.  larger tires spin slower, at there outer limits, while keeping the RPM's at the center constant.

Answer 9

Faster, and this link explains why

http://btc.montana.edu/olympics/physbio/...

Answer 10

she will spin faster with her arms closer to her body, (it will also look better)

Answer 11

It'll be faster for the same reason tight rope walkers can walk tight rope.

Answer 12

faster wow u didnt know that???

Answer 13

She will spin faster because she is closer together so she is hitting less resistance.

Answer 14

I will imitate Perredistas and say the complete opposite thing: Slower; but with a catch; it depends on which spin and how are the arms and at which phase of the spin are the arms far from the body.

Stephane Lambiel didn't sell his soul to Satan to get to those speeds and nor are his blades the Holy Grail melted into the shape of a blade. The thing is that he found out how to take advantage of the circumstances in which having your arms and legs away from your body to increase the velocity of a spin instead of decrease it.

It's hard to explain, I just know which tricks work and which don't that can boost several revs like magic to a sit spin that is running out of steam; a lot of it involves pulling your torso into an odd position and placing the blade of the free leg directly into the place where any person with a sane mind will say that won't work to speed up the spin. Yes, I am referring to placing the blade almost in the same position as a Pancake spin but outwards right where the centrifugal force is trying to pull the blade back in. The only catch I see is that despite the speed boost, the spin loses a bit of stability and I can't hold the position for too long (it's just way too much power for my muscles) but in the COP system, if you can boost some speed into a spin that's slowing down it's a level up. The guys at the ISU somehow know this is right against all logic.

Pulling your arms out also works in the Layback if you know when to do it and if your Layback is good enough to go to such speeds as to totally losing perception of gravity. I attempted this once and the Layback was so powerful yet so hard to control, I flew off the ice and fell quite a distance away not really knowing what the h**l had just happened. Basically it's not just that you pull your arms out, part of the trick is to pull them back in literally "trapping" as much centrifugal forces from around you as possible. If my Layback starts to become fully stable again, I'll try it again when the ice is good and there isn't any poor saps near me that will get squished when I do this crazy thing again.

Answer 15

faster.

Answer 16

If an iceskater is ALREADY spinning with her arms out, and moves them in closer to her body, she will spin faster.  Othrwise your question makes no sense.  An ice skater spins at whatever speed she can make herself spin...

Answer 17

you spin faster when your arms are closer to your body cause the weight is more concentrated

Answer 18

arms closer - faster

arms extended - slower.

try it while spinning on a chair.

explanation. not so detailed but enoughto give you a idea.

conservation in angular momentum means

angular momentum = L   is conserved there is no gain or loss of momentum.

1=initial(arms extended)

2=end(arms together with body)

L1(arms extended)=L2(arms closer)

L=Iw where I=inertia w=angular velocity(speed of spin)

I=mr(r)  where,m=mass(weight of the skater) r=radius/distance from the axle of spin or in this case the arms of the skater.

I=mr(r)

when the arms come in, r reduces. therefore in the equation L=Iw, w the spin speed must increase so that L1=L2.

which is the actual reason why angular velocity increases as the radius of spin decreases. this is as simpleand as straight forward as i cankeep it. hope you understand.