Joe,
CalcPad's ability to define and initialize variables is really neat!
Example for others reading this:
a=3: 3
b=4: 4
sqrt(a^2+b^2): 5
And its ability to handle units is useful for physics students.
x0=2 m: 2 m
v0=2 m/s: 2 m / sec
g=9.8m/s^2: 9.8 m / sec^2
t=4 s: 4 sec
x0+v0*t+.5*g*t^2: 88.4 m
If I go back up and redefine x0 as 3 m, the position
expression >automatically< changes to 89.4 m. Really nice!
I did have a problem when I tried to use mixed units.
x0=3 ft: ft*3
v0=2 m/s: 2 m / sec
g=9.8m/s^2: 9.8 m / sec^2
t=4 s: 4 sec
x0+v0*t+.5*g*t^2: ft*3+86.4 m
Neither ft or feet would work. This did:
x0=3 foot: 0.9144 m
v0=2 m/s: 2 m / sec
g=9.8m/s^2: 9.8 m / sec^2
t=4 s: 4 sec
x0+v0*t+.5*g*t^2: 87.3144 m
I'm sure you've given the ability to extend recognition to ft and
feet, but common units like these should be predefined. But that's a
very small criticism of such an excellent calculator.
Bob
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