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5 short explanations. Each one opens on its quiz, below the full worked solution.

Answer · RoboticsWhy a 20 kg arm only lifts 5 kgAnswer · RoboticsOne joint at 1,000 degrees a secondAnswer · RoboticsBackflip motors, sliding off a rampAnswer · RoboticsHand still, elbow swingingAnswer · Robotics5 mm too high, 200 newtons