Magnetic Fields

[19683]

On level 7 "speed demon", it says "the faster you go, the wider you curve".

Are you sure? Isn't the magnetic force proportional to speed? Correct me if I'm wrong.

[testtubegames]

This surprised me a bit too, since, yeah, you always hear about the magnetic force increasing with speed. And it does, proportionally, as you say.

But your radius of curvature *also* depends on your speed, too (and not just the force). Like how around the same star (and at the same distance), a speeding planet will make a wider 'arc' than a slow moving one.

So even though there's more force on a speeding , the arc is still wider.

I think counter-intuitive things are so rad.

[19683]

This surprised me a bit too, since, yeah, you always hear about the magnetic force increasing with speed. And it does, proportionally, as you say.

But your radius of curvature *also* depends on your speed, too (and not just the force). Like how around the same star (and at the same distance), a speeding planet will make a wider 'arc' than a slow moving one.

So even though there's more force on a speeding , the arc is still wider.

I think counter-intuitive things are so rad.

Oh yeah! a=v^2/r

I forgot to square the r.