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Science > Physics |
| User: |
"Richard M" |
| Date: |
04 Feb 2005 07:28:05 PM |
| Object: |
A Car's velocity |
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world. Suppose if it could, how
how would a speedometer read this?
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| User: "CWatters" |
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| Title: Re: A Car's velocity |
05 Feb 2005 04:49:08 AM |
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"Richard M" <richard.mcpherson@gmail.com> wrote in message
news:1107566885.832947.28070@o13g2000cwo.googlegroups.com...
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world.
F=MA
when A = very large, F is very large.
Suppose if it could, how how would a speedometer read this?
As a step change in speed.. however since the spedo pointer has mass it also
can't move from one position to another instantly. A similar problem will
occur with electronic speed sensors.
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| User: "Ornik Valid" |
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| Title: Re: A Car's velocity |
04 Feb 2005 07:46:49 PM |
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"Richard M" <richard.mcpherson@gmail.com> wrote in message
news:1107566885.832947.28070@o13g2000cwo.googlegroups.com...
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world. Suppose if it could, how
how would a speedometer read this?
Velocity change requires acceleration.
If by instantaneously you mean Zero, infinite acceleration is required
V = a*t, where you imply t = 0
If t = 0.0000001 sec then a is finite.
How much money do you have for the speedometer design phase?
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| User: "" |
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| Title: Re: A Car's velocity |
04 Feb 2005 07:35:31 PM |
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Richard M <richard.mcpherson@gmail.com> wrote:
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world. Suppose if it could, how
how would a speedometer read this?
An instantaneous speed change means an infinite acceleration which
means an infinite force.
A speedometer can't change instantaneously either.
--
Jim Pennino
Remove -spam-sux to reply.
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| User: "PD" |
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| Title: Re: A Car's velocity |
04 Feb 2005 08:52:36 PM |
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wrote:
Richard M <richard.mcpherson@gmail.com> wrote:
Could someone please tell me why a vehicle's speed can't increase
by 10
ms^-1 instantaneously in the physical world. Suppose if it could,
how
how would a speedometer read this?
An instantaneous speed change means an infinite acceleration which
means an infinite force.
A speedometer can't change instantaneously either.
--
Jim Pennino
Remove -spam-sux to reply.
Gee, I dunno. Rode on a Harley one time that came damn close. I bet
with nitro it could.
PD
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: A Car's velocity |
04 Feb 2005 09:20:03 PM |
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"PD" <pdraper@yahoo.com> wrote in message
news:1107571956.446076.292800@z14g2000cwz.googlegroups.com...
jimp@specsol-spam-sux.com wrote:
Richard M <richard.mcpherson@gmail.com> wrote:
Could someone please tell me why a vehicle's speed can't increase
by 10
ms^-1 instantaneously in the physical world. Suppose if it could,
how
how would a speedometer read this?
An instantaneous speed change means an infinite acceleration which
means an infinite force.
A speedometer can't change instantaneously either.
--
Jim Pennino
Remove -spam-sux to reply.
Gee, I dunno. Rode on a Harley one time that came damn close. I bet
with nitro it could.
PD
A real smart mouth answer from a supposed fucking shitbag of a
schoolteacher, Draper. You owe the kid an apology and a sensible reply,
you fucking moron.
He said please, which is far more than I'd expect from a creep like you.
Androcles.
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| User: "Uncle Al" |
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| Title: Re: A Car's velocity |
05 Feb 2005 10:47:27 AM |
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Richard M wrote:
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world. Suppose if it could, how
how would a speedometer read this?
How is "impulse" calculated? Plug in the numbers. Wht is the slope
of a delta function? Of any instantaneous change?
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "PD" |
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| Title: Re: A Car's velocity |
05 Feb 2005 11:18:27 AM |
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Richard M wrote:
Could someone please tell me why a vehicle's speed can't increase by
10
ms^-1 instantaneously in the physical world. Suppose if it could,
how
how would a speedometer read this?
Let me turn this into a more parochial question back at you.
You are proud of your car, with its fuzzy dice hanging from the mirror,
a Hurst tachometer, a GPS system, and the other usual instrumentation.
What in your car measures the following:
Distance traveled?
Displacement?
Speed?
Velocity?
Acceleration?
PD
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| User: "Sam Wormley" |
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| Title: Re: A Car's velocity |
04 Feb 2005 08:00:58 PM |
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Richard M wrote:
Could someone please tell me why a vehicle's speed can't increase by 10
ms^-1 instantaneously in the physical world. Suppose if it could, how
how would a speedometer read this?
Acceleration
http://scienceworld.wolfram.com/physics/Acceleration.html
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