Radio Shack TRS-80 PC-3

Program Title: SOFTLANDING GAME
OVERVIEW
This game involves landing a rocket, with only a limited amount of fuel, as softly as possible. The rocket is in free fall. The
engine is used to slow down the free-falling rocket. If ignition takes place too soon or too much fuel is used, then the rocket is
thrust back out into space and becomes dust around the planet.
If all the fuel is burned up, the rocket hits the planet and blows up.
The aim is to land the rocket as softly as possible by controlling the engines while watching how much fuel is burned.
CONTENTS
H height
V speed
a gravitational acceleration
t time
V
o
: initial speed
Gravity is set to be 5 mj(unit time)2.
If 5 units of fuel per a unit time are burnt, then gravity is offset.
Equations
H H
o
+ V0 t ++ at 2
V V
o
+ at
V
2
= V
0
2
+ 2aH
H
o
= 500, V
o
= -50, F
o
= 200
H
o
: initial height
V
o
: initial speed
F
o
: initial fuel
F : fuel
burned
The initial height, initial fuel level, and the wait time are stored in line 30 as data. By changing these values, the above variables
can be
changed.
INSTRUCTIONS
1. It is started by pressing @ W . Press CQJ ~ (]J keys to adjust the amount of fuel used to land the rocket.
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