Description
[Model Hierarchy]
This model is applicable to a point particle when the external forces are known or needed. It is a subclass of the model [Momentum and Force] defined by the constraint dm/dt = 0.
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Assumptions and Limitations
Prior Models
Vocabulary
- [Newton's Laws]
- mass
- acceleration
- force
Model Specification
System Schema
Internal Constituents: Point particle.
External Agents: External influences must be understood sufficiently to draw a free body diagram for the system.
Descriptors
Object Variables:
\begin
[m]\end
.
State Variables: None.
Interaction Variables:
\begin
[\vec
^
_
]\end
(i = 1,2,...,n where n is the number of external forces acting),
\begin
[\vec
]\end
.
Laws of Interaction
\begin
[ \sum_
\vec
^
_
= m\vec
] \end
As with all vector equations, this Law of Interaction should really be understood as three simultaneous equations:
\begin
[ \sum_
F^
_
= ma_
]
[ \sum_
F^
_
= ma_
]
[\sum_
F^
_
= ma_
]\end
Laws of Change
None.
Relevant Examples
null |
RELATE wiki by David E. Pritchard is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License |
