7-8
Solve aplet
where
X
is distance,
V
0
is initial velocity,
T
is time, and
A
is acceleration. This is actually
two
equations,
Y = X
and
Y = V
0
T + (AT
2
) / 2
.
Since this equation is quadratic for
T
, there can be both
a positive and a negative solution. However, we are
concerned only with positive solutions, since only positive
distance makes sense.
1. Select the Solve aplet and enter the equation.
Select
Solve
X
V
T
A
T
2
2.
Find the solution for
T
(time) when
X
=30,
V
=2,
and
A
=4.
Enter the values for
X
,
V
,
and
A
; then highlight
the independent variable,
T
.
30
2
4
to highlight T
3.
Use the Plot view to find an initial guess for
T
.
First set
appropriate
X
and
Y
ranges in the Plot Setup. With
equation
X = V
x
T + A
x
T
2
/2
, the plot will produce
two graphs: one for
and one for
X = V
x
T + A
x
T
2
/2
. Since we have set
in
this example, one of the graphs will be
.
Therefore, make the
YRNG
–
5 to 35. Keep the
XRNG
default of – 6.5 to 6.5.
SETUP
-
PLOT
5
35
4. Plot the graph.
Y
X
=
X
30
=
Y
30
=
Summary of Contents for 39g+
Page 1: ...hp 39g graphing calculator user s guide H Edition 2 Part Number F2224 90001 ...
Page 62: ...2 22 Aplets and their views 5 Display the functions in numeric form ...
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