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This is a case study designed to facilitate the learning of conservation of momentum and inelastic collisions. There are other physics concepts ingrained in the mathematics that are needed when examining this case.

Case Study – Physics, Decision/Dilemma Case with Trial Format

Force, Elastic and Inelastic Collisions, Momentum

As Pete took the stand, he knew he would have to answer a question from the prosecution that could send him to jail for a long time. The victim’s family was in attendance, and he felt horrible for the events that lead them to this meeting. “Do you swear to tell the truth, the whole truth, and nothing but the truth, so help you God?” “Yes, sir.”

“Mr. Fox, I am not going to beat around the bush with preliminary questions, I will get straight to the point; were you speeding the afternoon of October 26, 2008 when your vehicle struck the vehicle of Ms. Melanie Pinkerton, resulting in the death of her passenger, Mr. David Perez?”

“No, sir, I was not.”

“Are you prepared to be on record as saying that you were not speeding?”

“Yes, sir.”

“Okay, you are free to exit the sand.”

The prosecution then brought forward a police officer who clocked the car that Pete t-boned as going 47 miles per hour just before the accident. Both speed zones around the crash site were 45 mile per hour zones and Pete had already proven that his brakes failed, causing him to run a red light and hit David Perez with the full force of his car. Measurements were taken of the angle of the inelastic collision and the distance the two cars traveled after the collision. If Pete was speeding, he could go to jail for involuntary manslaughter and lying under oath.

How fast was Pete going at the point of the collision and will he go to jail?

Questions & Answers

how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
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Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, A case study of collisions. OpenStax CNX. Apr 20, 2009 Download for free at http://cnx.org/content/col10689/1.1
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