Re: What is Forced (accelerated) Motion?

From: Spaceman (Spaceman_at_realspaceman.com)
Date: 07/21/04 

Date: Wed, 21 Jul 2004 01:00:40 GMT

"Alex Hunsley" <lard@tardis.ed.ac.molar.uk> wrote in message
news:_4jLc.86783$q8.8405@fe1.news.blueyonder.co.uk...
} You misunderstand the use of acceleration here. What is being said is
} that all points on the disk (except the central point) are in
} acceleration when the disk is spinning, since they are changing their
} velocity constantly. Any point has constant *speed*, but not velocity
} (which has a direction). And a change in velocity is acceleration.

That is where you are losing the original "real world" meaning
of acceleration (speeding up)
A change in direction does not automaticall infer a change in velocity,
for if it did, the disk would be speeding up it's speed according to
the old fashion meaning of acceleration.

The mathematical world definition is very bad,
If I asked to to accelerate the point on the disk,
Would you speed up the disk, or tell me it is already accelerating,
constantly?

Relevant Pages

  • Re: What is Forced (accelerated) Motion?
    ... > The acceleration would be the angular velocity, squared, divided by ... > center of the disk. ... The point is, speed and velocity are not the same. ... Consider a small mass under the influence of the gravity ...
    (sci.math)
  • Re: What is Forced (accelerated) Motion?
    ... >} You misunderstand the use of acceleration here. ... >} acceleration when the disk is spinning, ... > A change in direction does not automaticall infer a change in velocity, ... Its velocity could be considered to be 6280 feet/second N, ...
    (sci.math)
  • Re: What is Forced (accelerated) Motion?
    ... >} You misunderstand the use of acceleration here. ... >} acceleration when the disk is spinning, ... > A change in direction does not automaticall infer a change in velocity, ... Its velocity could be considered to be 6280 feet/second N, ...
    (sci.physics)
  • Re: What is Forced (accelerated) Motion?
    ... >} The acceleration would be the angular velocity, squared, divided by the ... >} center of the disk. ...
    (sci.math)
  • Re: What is Forced (accelerated) Motion?
    ... >} The acceleration would be the angular velocity, squared, divided by the ... >} center of the disk. ...
    (sci.physics)