|
Event 5
Force Definition and Characteristics
1. A force is a push or pull experienced by an object.
2. Each force has both magnitude and direction making it a vector quantity.
3. Each force always finds immediate opposition or support against another
force, with said other force of opposition or support always being equal in
magnitude and opposite in direction.
This mutual force rule, as generally stated in Newton's LAW
III, always holds true for all such pairs of forces present during both accelerational
and non-accelerational events. Thus no force can exist without the immediate presence of a
mutual force of one type or another.
4. Acceleration for an object can be any combination of the following:
(a) a change in the object's speed (linear
acceleration),
(b) a change in direction for the object or portions thereof
(centripetal acceleration), and/or
(c) a change in the object's rate of rotation (tangential
acceleration).
5. An action force is a force causing the activity of acceleration for an
object.
Thus acceleration's exclusive cause is an action force.
6. An active object is an object experiencing acceleration.
Conversely, an inactive object is one where acceleration is
absent.
7. Force is invisible.
Sometimes we can see the effect of a force but never
the force itself. Scales are often effective in displaying the presence and
magnitude of the pair of mutual forces present between contacting objects. Therefore it is
important in the study of forces to use scales whenever possible.
8. Force is absolute.
No matter how one views an event where forces are present,
from every conceivable frame of reference, the existence and magnitude
of the mutual forces present will always remain the same or absolute. One only needs to apply a
scale to the event to make clear the absolute nature of force.
to be continued ...
|
|
|
Copyright Notice
Event 5, "Golf Club Swing & Impact Forces" (C) Copyright
2006-2008 by Ethan Skyler. All
rights reserved. No
portion of Event 5, minus the exception noted below, may be copied by any means without the author's
written permission and even then only if the author's copyright notice is
permanently affixed to each approved copy. To request written permission
visit Contacts.
The author grants each visitor to The
Universal Physics
Journal the right to make one copy of Event 5 for his or her own
personal archive as long as the author's copyright notice is permanently
affixed to the archive copy.
|