Recent content by Phynn

Is that necessarily true? If so, that would explain a lot.

If you were to dissipate in the electronics, would that mean that you are using resistors to slow down? And does that imply that you can't simply slow down by generating magnetic fields that repel and attract the wires in the electric motors at the right moments to slow down it's rotation? Or...

Thank you! You get me completely and your answer really helped me understand. I do have one question: it sounds like you are assuming regenerative braking (because of the "and thence back to the battery") but I meant the scenario without regenerative braking. Without regenerative braking, would...

If I understand electric motors correctly, it works different for an electric motor: acceleration (or starting to move the weight upward) consists of magnetically pushing and pulling wires in the electric motor, and deceleration (or stopping the downward movement) works exactly the same. The...

You're right, I was assuming that the system is stationary at the beginning and end. I'm not sure what kind of specifications for the system you mean, but I will do my best here: There is no friction. There is a perfect vacuum. The electric motors are perfectly efficient. The acceleration is...

Thanks for the replies! If I understand correctly, you are saying that there should be more energy consumed in the first scenario, or more heat released in the second scenario. Making the assumption that the motor is 100% efficient is a good suggestion so I will do that. That would mean that no...

I've had this question for a while now and I wonder if anyone can make sense of it. It's about two scenarios where the difference between them seems to contradict conservation of energy: Scenario 1: In a vacuum chamber, there is a robotic arm, a box, a lower platform and a higher platform. At...