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IRA11Y Forums Junkie Club Member Location: sydney Registered: May 2002	Re: Physics problem. Thu, 24 March 2005 05:39 ok ill bite with PE seeing as in my opinion, that is the resultant you are really measuring. speed is just a part of the equation, at constant speed acceleration isnt an issue so all that is left is the potential energy of the two masses so lets do the math... ill assume that bbaacchhyy's equation is correct despite my instincts as an engineer ( telco ) tell me to never trust anything that i havent seen and refrenced myself. sooooo... PE= 0.5 x mass x velocity^2 so lets take the first scenario of two cars traveling at 50kmh towards each other and assume they both weight 1000kg PE= 0.5 x 1000 x 50^2 x 2 PE= 500 x 2500 x 2 PE= 1.25M x 2 PE= 2.5Mj of energy scenario 2 the same car of 1000kg travelling at 100kmh to a stationary object that weighs 1000kg PE= (0.5 x 1000 x 100^2) + (0.5 x 1000 x 0^2) PE= (500 x 10000) + (500 x 0) PE= 5Mj + 0j PE= 5Mj of energy im fairly confident those calcs are correct, maybe someone needs to double check, the only discretion may be the way the mass of the wall is calculated. [Report message to a moderator]

	Subject	Poster	Date
	Physics problem.	Squid	Thu, 24 March 2005 03:43
	Re: Physics problem.	Corona RT142	Thu, 24 March 2005 03:46
	Re: Physics problem.	Squid	Thu, 24 March 2005 03:50
	Re: Physics problem.	Corona RT142	Thu, 24 March 2005 03:50
	Re: Physics problem.	Norbie	Thu, 24 March 2005 03:51
	Re: Physics problem.	Squid	Thu, 24 March 2005 03:58
	Re: Physics problem.	Indi	Thu, 24 March 2005 04:28
	Re: Physics problem.	STR8 2.8	Thu, 24 March 2005 04:32
	Re: Physics problem.	86DRFT	Thu, 24 March 2005 12:27
	Re: Physics problem.	Norbie	Fri, 25 March 2005 07:14
	Re: Physics problem.	Intensevil	Thu, 24 March 2005 04:25
	Re: Physics problem.	Corona RT142	Thu, 24 March 2005 04:31
	Re: Physics problem.	Squid	Thu, 24 March 2005 04:34
	Re: Physics problem.	Indi	Thu, 24 March 2005 04:42
	Re: Physics problem.	BlackMR2	Thu, 24 March 2005 04:32
	Re: Physics problem.	white86	Thu, 24 March 2005 04:44
	Re: Physics problem.	white86	Thu, 24 March 2005 04:51
	Re: Physics problem.	Mookie	Thu, 24 March 2005 04:58
	Re: Physics problem.	bbaacchhyy	Thu, 24 March 2005 05:08
	Re: Physics problem.	IRA11Y	Thu, 24 March 2005 05:39
	Re: Physics problem.	Dust	Thu, 24 March 2005 05:34
	Re: Physics problem.	Norbie	Thu, 24 March 2005 05:39
	Re: Physics problem.	skellator	Thu, 24 March 2005 05:57
	Re: Physics problem.	BlackMR2	Thu, 24 March 2005 05:58
	Re: Physics problem.	IRA11Y	Thu, 24 March 2005 06:04
	Re: Physics problem.	IRA11Y	Thu, 24 March 2005 06:07
	Re: Physics problem.	EnFlaMEd	Thu, 24 March 2005 06:33
	Re: Physics problem.	SPRINTAH!	Thu, 24 March 2005 06:30
	Re: Physics problem.	skellator	Thu, 24 March 2005 06:43
	Re: Physics problem.	SPRINTAH!	Thu, 24 March 2005 07:47
	Re: Physics problem.	IRA11Y	Thu, 24 March 2005 08:13
	Re: Physics problem.	skellator	Thu, 24 March 2005 08:57
	Re: Physics problem.	skellator	Thu, 24 March 2005 06:33
	Re: Physics problem.	RWDboy	Thu, 24 March 2005 06:42
	Re: Physics problem.	skellator	Thu, 24 March 2005 06:54
	Re: Physics problem.	RWDboy	Thu, 24 March 2005 06:49
	Re: Physics problem.	RWDboy	Thu, 24 March 2005 07:20
	Re: Physics problem.	skellator	Thu, 24 March 2005 07:44
	Re: Physics problem.	RWDboy	Thu, 24 March 2005 13:42
	Re: Physics problem.	CrUZsida	Thu, 24 March 2005 08:39
	Re: Physics problem.	CrUZsida	Thu, 24 March 2005 08:59
	Re: Physics problem.	NeiGH	Thu, 24 March 2005 09:51
	Re: Physics problem.	skellator	Thu, 24 March 2005 10:01
	Re: Physics problem.	Alex120	Fri, 25 March 2005 11:49
	Re: Physics problem.	86DRFT	Thu, 24 March 2005 12:22
	Re: Physics problem.	skellator	Fri, 25 March 2005 01:42
	Re: Physics problem.	RWDboy	Fri, 25 March 2005 08:16
	Re: Physics problem.	b1gb3n	Fri, 25 March 2005 02:37
	Re: Physics problem.	skellator	Fri, 25 March 2005 08:40
	Re: Physics problem.	RWDboy	Fri, 25 March 2005 09:10
	Re: Physics problem.	skellator	Fri, 25 March 2005 09:22
	Re: Physics problem.	gabe	Sat, 26 March 2005 00:46
	Re: Physics problem.	skellator	Sat, 26 March 2005 00:58
	Re: Physics problem.	RobertoX	Wed, 30 March 2005 05:40
	Re: Physics problem.	skellator	Wed, 30 March 2005 06:35
	Re: Physics problem.	RWDboy	Fri, 25 March 2005 10:42
	Re: Physics problem.	Alex120	Fri, 25 March 2005 11:45
	Re: Physics problem.	RWDboy	Fri, 25 March 2005 12:40
	Re: Physics problem.	skellator	Fri, 25 March 2005 22:50
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 01:47
	Re: Physics problem.	skellator	Sat, 26 March 2005 02:16
	Re: Physics problem.	gabe	Sat, 26 March 2005 02:59
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 01:53
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 03:21
	Re: Physics problem.	IRA11Y	Sat, 26 March 2005 03:29
	Re: Physics problem.	Squid	Tue, 29 March 2005 03:48
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 03:29
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 03:33
	Re: Physics problem.	skellator	Sat, 26 March 2005 03:41
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 04:13
	Re: Physics problem.	skellator	Sat, 26 March 2005 04:24
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 04:47
	Re: Physics problem.	IRA11Y	Sat, 26 March 2005 05:04
	Re: Physics problem.	skellator	Sat, 26 March 2005 05:26
	Re: Physics problem.	skellator	Sat, 26 March 2005 06:06
	Re: Physics problem.	tom210	Sat, 26 March 2005 06:52
	Re: Physics problem.	skellator	Sat, 26 March 2005 06:56
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 07:02
	Re: Physics problem.	skellator	Sat, 26 March 2005 07:05
	Re: Physics problem.	tom210	Sat, 26 March 2005 07:19
	Re: Physics problem.	jackel	Sat, 26 March 2005 07:23
	Re: Physics problem.	skellator	Sat, 26 March 2005 07:39
	Re: Physics problem.	tom210	Sat, 26 March 2005 07:28
	Re: Physics problem.	Norbie	Sat, 26 March 2005 09:47
	Re: Physics problem.	skellator	Sat, 26 March 2005 10:10
	Re: Physics problem.	Norbie	Sat, 26 March 2005 10:12
	Re: Physics problem.	skellator	Sat, 26 March 2005 10:21
	Re: Physics problem.	EldarO	Sat, 26 March 2005 11:37
	Re: Physics problem.	Norbie	Sun, 27 March 2005 02:02
	Re: Physics problem.	EldarO	Tue, 29 March 2005 16:41
	Re: Physics problem.	tom210	Sat, 26 March 2005 12:46
	Re: Physics problem.	RWDboy	Sat, 26 March 2005 12:53
	Re: Physics problem.	skellator	Sun, 27 March 2005 02:36
	Re: Physics problem.	RWDboy	Sun, 27 March 2005 03:15
	Re: Physics problem.	RWDboy	Tue, 29 March 2005 04:41
	Re: Physics problem.	skellator	Tue, 29 March 2005 05:50
	Re: Physics problem.	RWDboy	Tue, 29 March 2005 12:07
	Re: Physics problem.	skellator	Tue, 29 March 2005 21:05
	Re: Physics problem.	79rollaboy	Tue, 29 March 2005 21:20
	Re: Physics problem.	RobertoX	Wed, 30 March 2005 00:19
	Re: Physics problem.	RWDboy	Wed, 30 March 2005 00:42
	Re: Physics problem.	skellator	Wed, 30 March 2005 04:40
	Re: Physics problem.	RobertoX	Wed, 30 March 2005 04:49
	Re: Physics problem.	skellator	Wed, 30 March 2005 04:57
	Re: Physics problem.	RWDboy	Wed, 30 March 2005 13:47

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