Desperate! (basic physics help) - Page 2

farmergiles · 02-19-2011, 04:28 PM

Quote:

Originally Posted by Mafoo

got another one im stuck on.. im guessing its also quite simple but im struggling and ive been doing problems for 3 hours so my minds feeling strained

The force is linearly proportional to the extension of the spring. So use the average force, which is half the force at the maximum extension.

**Mafoo** · 02-19-2011, 04:51 PM

i ought to say, i go the answers already.

i used force of spring = -1/2K(displacement)^2; k being the spring constant

it was an issue of the different paths that screwed up my answer. thanks though FG i do appreciate that tip

Roach · 02-19-2011, 06:58 PM

I always used to get into trouble over Ambiguity.

I would argue that in reality springs do not exert equal force thru their length of extention.

something like, When a spring is compressed or stretched, the force it exerts is proportional to its change in length.

some times it actually worked

mostly

it didn't.

Kompressor · 02-19-2011, 07:00 PM

Ah physics, I love physics.

It's where science and math intertwine to birth the secrets of the universe.

Captain Cannabis · 02-19-2011, 09:52 PM

if you need any help with this nature of stuff, send me a pm

i am all sciency and stuff

Man in Black · 02-19-2011, 09:59 PM

^i would trust this man with my mathematical life

Captain Cannabis · 02-19-2011, 10:43 PM

am i too late to answer the question. i don't feel like reading this entire thread

Roach · 02-20-2011, 12:06 AM

where's SecondLawOfThermaldy namics

or...whatever...."th e other sciency guy".

farmergiles · 02-20-2011, 04:12 AM

Quote:

Originally Posted by Roach

I would argue that in reality springs do not exert equal force thru their length of extention.

Yes, in the real world you're right. There usually is a range of extension which is pretty linear though.

**Mafoo** · 02-20-2011, 11:55 AM

Quote:

Originally Posted by Captain Cannabis

am i too late to answer the question. i don't feel like reading this entire thread

ya i got the answer, i will be back with more questions later, im sure.

Quote:

Originally Posted by Roach

I always used to get into trouble over Ambiguity.

I would argue that in reality springs do not exert equal force thru their length of extention.

something like, When a spring is compressed or stretched, the force it exerts is proportional to its change in length.

some times it actually worked

mostly

it didn't.

thats actually what the equation i used says. the displacement is the distance that the spring is compressed or extended away from its equilibrium position. im sure in a higher level physics class they would employ caclulus to get more accurate answers using limits and the like.

thanks for looking everyone, i love science but i just met phyisics and im not sure how i feel about the guy yet

Captain Cannabis · 02-20-2011, 11:59 AM

physics is scary when they give you the real integrals to be solved

02-19-2011, 04:51 PM	#22 (permalink)
Mafoo nice daze Join Date: Nov 2005 Location: the anguish of anticipated transformation Posts: 5,975 Thanks: 3,776 Thanked 2,652 Times in 1,698 Posts	i ought to say, i go the answers already. i used force of spring = -1/2K(displacement)^2; k being the spring constant it was an issue of the different paths that screwed up my answer. thanks though FG i do appreciate that tip __________________ PLUR For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return

02-19-2011, 06:58 PM	#23 (permalink)
Roach Victoria Aut Mors Join Date: Dec 1999 Posts: 7,182 Thanks: 2,372 Thanked 1,985 Times in 1,508 Posts	I always used to get into trouble over Ambiguity. I would argue that in reality springs do not exert equal force thru their length of extention. something like, When a spring is compressed or stretched, the force it exerts is proportional to its change in length. some times it actually worked mostly it didn't. __________________ לזיין את הקופים

02-19-2011, 07:00 PM	#24 (permalink)
Kompressor Voice of Reason Join Date: Dec 2000 Location: Illinois Posts: 8,361 Thanks: 0 Thanked 3,069 Times in 1,634 Posts	Ah physics, I love physics. It's where science and math intertwine to birth the secrets of the universe. __________________ Think like a man of action, act like a man of thought. -H. Bergson

02-19-2011, 09:52 PM	#25 (permalink)
Captain Cannabis safety word: more Join Date: Jul 2001 Location: m.i.a. Posts: 13,922 Thanks: 2,705 Thanked 3,174 Times in 1,812 Posts	if you need any help with this nature of stuff, send me a pm i am all sciency and stuff __________________ fuck the monkeys

02-19-2011, 09:59 PM	#26 (permalink)
Man in Black willie d Join Date: Sep 2004 Location: dayton,ohio Posts: 4,817 Thanks: 3,200 Thanked 1,348 Times in 896 Posts	^i would trust this man with my mathematical life __________________ When I was arrested I was dressed in black.

02-19-2011, 10:43 PM	#27 (permalink)
Captain Cannabis safety word: more Join Date: Jul 2001 Location: m.i.a. Posts: 13,922 Thanks: 2,705 Thanked 3,174 Times in 1,812 Posts	am i too late to answer the question. i don't feel like reading this entire thread __________________ fuck the monkeys

02-20-2011, 12:06 AM	#28 (permalink)
Roach Victoria Aut Mors Join Date: Dec 1999 Posts: 7,182 Thanks: 2,372 Thanked 1,985 Times in 1,508 Posts	where's SecondLawOfThermaldy namics or...whatever...."th e other sciency guy". __________________ לזיין את הקופים

02-20-2011, 11:59 AM	#31 (permalink)
Captain Cannabis safety word: more Join Date: Jul 2001 Location: m.i.a. Posts: 13,922 Thanks: 2,705 Thanked 3,174 Times in 1,812 Posts	physics is scary when they give you the real integrals to be solved __________________ fuck the monkeys

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