Recent content by Alexandra Fabiello

I mean, without friction maybe, I can't really visualize this stuff...

Could have sworn I replied to this. Ah well. I asked my teacher about this and she clarified some stuff. It's weird to think of displacement being the y1 and y2 and not distance traveled, especially since this means that the velocity direction should be given as the direction of displacement...

Whoops, I mixed up 'change in kinetic energy' with force somehow. Thanks, that worked!

I was using the start point at 0 m/s as y1, which is 0 m, and the end point at the bottom of the bowl as y2 at 2.5 m/s.

force = 4.2e7 J/90 m = 466666.6667 N this minus 2.10e5 = 2.57e5 N rounded This is incorrect, so I'm probably missing a formula or something.

v1 = 0 m/s v2 = 2.5 m/s y1 - y2 = distance a quarter of the way around the bowl (since we're neglecting friction) mass can be factored out, so it isn't needed, and some simplifying and the like gets this formula: v22 = v12 + 2g(y1 - y2) so 2.52 = 0 + 2(9.8)(y) 6.25 = 19.6y y = 0.318877551 m *...

Never mind, I got it. Just had to do a lot of diagrams and turn everything into right angle triangles, and it worked out. Thanks everyone!

Well that didn't work. Do I consider the A vectors as negative when I add the components?

I am admittedly entirely confused as to where to start, sorry. This is the diagram I'm given that fits with the rA + rB. If rB is 47.0 degrees above the x-axis normally, it would be the same counter-clockwise here, right? Then 180 - 47 = 133 degrees for the clockwise angle. But now I'm stuck...

teast(0.495 m/s + 1.28 m/s) = teast(1.775 m/s) So 3155.856574 m /1.775 m/s = teast = 1777.947366 s going east 1777.947366 s * 0.495 m/s = 880.083946 m walked east = 8.80*102 m walked east rounded to 3 significant figures. Right? Thank you so much. Missed the obvious, but that's why I come...

6.44 km * 1000 = 6440 m/2.51 m/s = 2565.737052 s = west time av = (6440 m + - east distance)/(2565.737052 s + east time) 2565.737052 s + east time = total time 1.28 m/s * total time = (6440 m) - (0.495 m/s * east time) 1.28 m/s * (2565.737052 s + east time) = (6440 m) - (0.495 m/s * east...

I think a better question would be "If the universe stopped expanding and started shrinking instead, where in space would end up being in the middle of the final clump of matter before it went singularity on us?" Though that would probably still be 'everywhere', more or less, I suppose.

Oh. That's actually pretty cool, but pretty weird as well.

Oops, someone else said that, not you. About the Big Bang not starting from one point like the common view is. Sorry. If we went constantly in one direction in the correct direction, wouldn't we eventually get to the bottom of the 'balloon'? The point where everything is moving away from? That...

1. You literally just said that the Big Bang isn't a single point. Now you're saying it is. No wait, I think I get it, more or less... 2. Okay. 3. Oddly enough, I actually get the balloon thing, sort of. Though since there IS a start point to the expansion, while technically not a 'center'...