Physics
Physics, 10.12.2021 21:00, 1940swannabe

Docking ExercisePreparing for the return to space, NASA needs to train astronauts in spacecraft docking. Besides simulators, they want to train with actual vehicles, but we have no spacecraft touse. That and budget cuts have led to the use of a computer controlled go cart and a semitractor trailer with a 5 meter long ramp. In the trailer is a firmly mounted mini dockingring at the top of the ramp and the go cart has a matching tunnel mounted on the front sothat it will slip into the docking ring and latch. The computer on the go cart has a verysimple set of commands. Each program step specifies a time interval in seconds and eitheran acceleration in m/s2 or a velocity in m/s which is to be used for that interval. You canonly specify a velocity to maintain if you are already moving at that velocity. The cart hassensors which provide distance from the back of the trailer and velocity relative to theground and velocity relative to the trailer. The starting configuration has the cart moving at 5 m/s relative to the road and 200meters from the bottom of the ramp (205 meters from the docking ring). The truck ismoving at 15 m/s relative to the road. You are to achieve docking within 200 seconds andthe docking clamps need a 0.3 m/s impact speed to set the latches. For safety, youraccelerations should all be less than 5g’s (49 m/s2) and your velocity relative to the truckshould be less than 3 m/s when you are within 15 meters of the ramp (20 meters fromdocking).There is no unique answer for this problem, but do check to make sure that your cartdoesn’t accelerate past the docking ring. A good way to check your solution is to use aspreadsheet with 1 row per second and calculate the distance to docking at each second. This isn’t hard, but it does require attention to details and you will likely learn somethingabout how many variables you can specify without creating a conflict. Your Solution: velocity in m/s, acceleration in m/s2.

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Docking ExercisePreparing for the return to space, NASA needs to train astronauts in spacecraft dock...

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