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/sci/ - Science & Math

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1001247 No.1001247 [Reply] [Original]

/sci/, I was wondering if you could help me out...

I'm doing mechanics papers and using the formula to calculate impulse, I = mv - mu, but I always end up with the answer as negative when the mark schemes say it's positive and as far as I can tell, they get that by using the formula as I = mu - mv, which is wrong?

Halp, basically.

>> No.1001259

I can count to 10

>> No.1001289

>>1001259
oh yeah? i can count to 16. beat that.

>> No.1001294

>>1001259
>>1001289

I have a calculator. Gtfo faggots

>> No.1001295

>>1001289
I CAN COUNT TO POTATO

>> No.1001333

>>1001295
>>1001294
>>1001289
>>1001259
you think you guys are badass? i have a girlfriend.

>> No.1001391

>>1001333
How the fuck does that make you badass?

>> No.1001395
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1001395

>>1001333
Here, have a VASIMR.

>> No.1001415

>>1001247

have you set the positive direction correctly? I always set it as positive when j is going against gravity but lots of people reverse that. As long as you make it evident that you have set positive a certain way and explain why your answer is negative rather than positive you should still get the marks (: good luck btw. Mechs is a killer

>> No.1002662

>>1001415
thank you! ^_^

>> No.1002674

>>1001247
sure is engineering in here
FAGGOTS EVERYWHERE!