[SI-LIST] Re: HSDD: Re: SI Position Open READ THIS!!!!
- From: "Mary" <mary@xxxxxxxxxxxx>
- To: "'Si-List@Freelists. Org'" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 31 Jan 2002 09:18:18 -0600
Whoops. Better rethink this. If the acceleration is not positive,
the golf ball will never have a greater velocity than it had
when it separated from the golf club. Same goes for the car.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Kim, Richard
Sent: Wednesday, January 30, 2002 8:05 PM
To: 'arpad.muranyi@xxxxxxxxx'; 'Si-List@Freelists. Org'
Subject: [SI-LIST] Re: HSDD: Re: SI Position Open READ THIS!!!!
I am not sure if you are applying Newton's law correctly.
When you press the clutch, you are removing the rotational
force on the wheels.
Think of hitting a golf ball. After the impact, the applied
force is no longer there. Applied force being mass and
acceleration of the club head.
Does the ball reach the highest speed at the impact and
slows down immediately?
Although the applied force has gone away, the ball should continue
accelerating until it meets opposing forces.
Now the force on the ball is the mass x acceleration of the ball.
If there was no air resistance and gravity, according to Newton's law
the ball should have constant acceleration resulting in increase in speed.
At the point of impact, the ball receives a force = mass of club head
x accel of club head. Due to air resistance and gravitational pull the
the ball immediately starts to decrease its acceleration, but still
increasing
in speed until acceleration becomes zero.
So getting back to car example, if there were no air resistance, friction
from the wheels and no gravity, the acceleration of the car would be
constant
therefore increasing in speed.
If the acceleration was high enough, it wouldn't be surprising to see
some increase in speed while acceleration goes down to zero.
Richard
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
