HP 50g User Manual Page 255

Graphing calculator.

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 ) and acceleration (ar, a )
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).
D, DD = -dot (first derivative of ), -double dot (second derivative of ).
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Suppose you are given the following information: r = 2.5, rD = 0.5, rDD = -
1.5, D = 2.3, DD = -6.5, and you are asked to find vr, v , ar, a , 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 [ D ] 6.5 \ [ DD ].
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