Physical AI Lab // Episode 0.3 // Quiz
See, think, act
One second of a robot's life, in slow motion
01
A robot has only one camera, pointed at the table; it can't see its own hand and reads no joint data. What problem is it most likely to have?
It can't make out the colour and shape of the cup and bottle
It can't tell where its hand is or how wide it is open
The slow system can't break the task down into steps
It can't save the images at fifteen frames per second
02
A public dataset records images and actions at 15 frames a second; one company's control interface exchanges commands 1,000 times a second. How should you read the gap?
Different layers: recording rate vs low-level control
One of the numbers must be a typo and needs checking
15 is how often it thinks slowly; 1,000 is the camera's rate
The slower the recording, the faster the motors must turn
03
The robot must “grab the cup, go around the bottle, then set the cup aside”. Which part mainly works out a step-by-step plan like this?
The low-level motor control running 1,000 times a second
The fast system that turns out actions quickly
The slow system that thinks the steps through
The layer recording images at 15 frames a second
04
On 50 Hz robots, π0 re-runs its reasoning after every 25 actions. If instead it thought only once at the start and then executed to the end, what problem is most likely?
The motors get fewer commands and gradually stall
The camera would capture fewer frames each second
Actions get more precise because nothing interrupts them
If the bottle moves, it won't replan in time
05
The arm has planned a path around the bottle, but while moving the hand drifts off bit by bit and finally hits the bottle. Which layer should you suspect first?
Low-level control lagged, so the drift wasn't corrected in time
The slow system split the task into the wrong steps
The dataset's recording rate was too low to see clearly
The camera never spotted where the bottle was in the first place
Check