Transcript AlgebraWeek1

Applications of College Algebra
Presented by Dr. Sherry Savrda
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What is a scientific model?
How is math used in modeling?
Some examples of mathematical models
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Sliding friction
Electric fields
Freefall
Applying our new ideas
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A simplified description of a physical
phenomenon that retains all the primary
features of the observed phenomenon
Can take several forms
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Verbal
Pictorial
Graphical
Mathematical
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An electric field is a way of describing how
charged objects affect the space around
themselves.
A charged object placed in a field will feel a
force, which is a result of the electric field
interacting with the new charged particle.
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Objects moving near Earth and subject only to
Earth’s gravitational field are said to be in
freefall.
The freefall model neglects both the size and
the shape of the object that is moving in Earth’s
gravitational field.
The effects of air resistance (drag) are also
neglected.
y = 2 m + (20 m/s) t -(1/2)(9.8m/s2) t2
Ball thrown straight up from height 2 m with
a speed of 20 m/s.