E-CodeKinematics: leave the two unknowns blank — a TI-89 Titanium program
SUVAT89 is a TI-89 BASIC program for the TI-89 Titanium. The five constant-acceleration quantities in one dialog — type the three you know and leave the other two BLANK; the right SUVAT equation is chosen for you, answers stay exact when they can, and when a square root gives two answers with t ≥ 0 (a ball passing a height going up and coming down) it shows BOTH.
What it asks for and what it shows
It asks for 5 values at its prompts. In the example below it shows S, U, V, A, T.
Example run
One of its oracle test cases: “s,u blank: from v, a, t”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | |
| Input 2 | |
| Input 3 | 20 |
| Input 4 | 2 |
| Input 5 | 5 |
| The screen shows | |
S= | 75 |
U= | 10 |
V= | 20 |
A= | 2 |
T= | 5 |
How it's checked
8 test cases, each checked against an independent method. Replayed key by key on a virtual TI-89 Titanium, they make 60 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-89 Titanium calculator and pick “Kinematics: leave the two unknowns blank” (SUVAT89).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.