HP 50G, Руководство пользователя

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Page 7-18
An explanation of the variables follows :
SOLVEP = a program that triggers the multiple equation solver for the
particular set of equations stored in variable PEQ ;
NAME = a variable storing the name of the multiple equation solver, namely ,
"vel. & acc. polar coord." ;
LIST = a list of the variable used in the calculations, placed in the order we
want them to show up in the multiple equation solver environment;
PEQ = list of equations to be solved, corresponding to the radial and
transverse components of velocity ( vr , v
θ
) and acceleration ( ar , a
θ
)
in polar coordinates, as well as equations to calculate the
magnitude of the velocity (
v ) and the acceleration ( a ) when the
polar components are known.
r , rD , rDD = r (radial coordinate), r-dot (first derivative of r), r-double dot
(second derivative of r).
θ
D ,
θ
DD =
θ
-dot (first derivative of
θ
),
θ
-double dot (second derivative of
θ
).
________________________________________________________________
Suppose you are given the following information: r = 2.5, rD = 0.5, rDD = -
1.5,
θ
D = 2.3,
θ
DD = -6.5, and you are asked to find vr, v
θ
, ar, a
θ
, v, and a.
Start the multiple equation solver by pressing
J
@SOLVE
. The calculator
produces a screen labeled , "vel. & acc. polar coord." , that looks as follows:
To enter the values of the known variables, just type the value and press the
button corresponding to the variable to be entered. Use the following
keystrokes: 2.5 [ r ] 0.5 [ rD ] 1.5
\
[ rDD ] 2.3 [
θ
D ] 6.5
\
[
θ
DD ].