The discussion centers on the energy transformation in a circuit involving a 1-V battery, a 9-V battery, a resistor, and a motor. Participants debated whether the correct answer to the energy transformation question is option C or A, with a consensus leaning towards C, which includes electrical energy being converted into mechanical energy. The conversation highlights the importance of understanding mechanical energy as the sum of potential and kinetic energy, particularly in the context of a pulley system lifting a load. Ultimately, one participant proposed that none of the given answers were correct, suggesting a more comprehensive transformation sequence: chemical → electrical → thermal + mechanical.
PREREQUISITESStudents studying physics, educators teaching energy concepts, and anyone interested in understanding electrical and mechanical energy transformations in circuits.
Because the pulley lifts a load so I think there would be energy converted to GPE, which is not covered by option Akuruman said:
I thought the mechanical energy in this case maybe refer to something in the motor or pulley (like rotation). Is it not? So the correct answer should be A?kuruman said:
Are you asking me or are you telling me? As you know, according to our rules we cannot give answers away.songoku said:
I am asking, sorry.kuruman said:
Is my reasoning not correct?songoku said:
I believe if you are adhering to the definition, then gravitational potential is a part of mechanical energy. Do you have definitions given to you of mechanical energy that say otherwise?songoku said:
No, I don't. What I learned about mechanical energy is that it is the sum of potential and kinetic energy. I am only using my own interpretation that maybe this is some trick question so I tried to include whatever rotation in motor and pulley to be referred as mechanical energy and gravitational energy is treated separatelyerobz said:
If you remember, let us know what the supposed correct answer was when you find out.songoku said: