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/sci/ - Science & Math

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5186218 No.5186218 [Reply] [Original]

Which of the three penguins have the highest energy? I told my teacher that it was impossible to figure out even relatively because they could be different weights and even if they were all the same weights, wouldn't they all have the same energy?

he said i was wrong and to think harder

>> No.5186226

Did he specify what type of energy?

>> No.5186229

>>5186226
Well, no. But I'm assuming the total energy of the system (like Epot + Ekin)

>> No.5186237

>>5186229
If we're including potential energy then it should still be the same. If it's just kinetic then the one closest to the ground will be higher because more potential energy is converted into kinetic as it falls further.

>> No.5186239

>>5186229
That makes sense to me, perhaps he's trolling you and the top one has the most because none are moving in the photo
>lolz freezeframe

>> No.5186241

>>5186237
well yeah thats what i thought but i'm not so sure.

>>5186239
that would be awful. lol

>> No.5186248

If you aren't ignoring drag, then the one at the top /would/ have the most PE+KE, since less of it's energy has been lost to drag. But it's being kind of dumb and picky about it.

>> No.5186255

So what would happen if they jumped from different heights? Like the one at the top jumped from somewhere higher? Would they still be the same??

>> No.5186270

>>5186255
Oh heavens no. If you kept the same ordering, say the penguins are, top to bottom, A B and C, and they started from initial heights, hA, hB, and hC, and hA>hB>hC, then the differences in energy would only increase. The only way to make the problem interesting would be to mix up the orders of the h's. But still, the energy lost to drag is kind of trivial over even a height of 10's of meters. maybe even 100's, I'd have to do some figuring.

>> No.5186277

>>5186270
okay, thanks :)

>> No.5186279

>>5186237
air resistance makes the lower penguin have lower energy

>> No.5186280

>>5186218
>>5186229
Clearly the top has the most energy as over time it loses energy to friction. Plus, technically the top one has the most chemical potential energy (fat, sugar etc.) by an extremely small amount. That fourth one way up at the top is hard to see, yes, but don't forget about him, because he's the answer.

>> No.5186293

>>5186280
LOL

>> No.5186385

>>5186280
Your eyes deceive you - there is, in fact, a FIFTH penguin partially hidden behind the fourth.