Correct energy transformation about circuit with EMF, a resistor and a motor

[songoku]

Homework Statement

Please see below

Relevant Equations

Energy transformation

My answer is C (although I am not sure if the correct one is C or D). I suppose since the 1-V battery is being charged by the 9-V battery, the electrical energy should be on the RHS of the energy transformation. Am I correct?

Thanks

 

[kuruman]

Given that you think that the correct answer is C, why did you exclude answer A? What's the difference between A and C?

 

[songoku]

Given that you think that the correct answer is C, why did you exclude answer A? What's the difference between A and C?

Because the pulley lifts a load so I think there would be energy converted to GPE, which is not covered by option A

Thanks

 

[kuruman]

What do you understand mechanical energy to be?

Hint: Read the first sentence here.

 

[songoku]

What do you understand mechanical energy to be?

Hint: Read the first sentence here.

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?

Thanks

 

[kuruman]

So the correct answer should be A?

Are you asking me or are you telling me? As you know, according to our rules we cannot give answers away.

 

[songoku]

Are you asking me or are you telling me? As you know, according to our rules we cannot give answers away.

I am asking, sorry.

My answer is still the same, it is C and the reasoning is this

I thought the mechanical energy in this case maybe refer to something in the motor or pulley (like rotation)

Is my reasoning not correct?

Thanks

 

[erobz]

I am asking, sorry.

My answer is still the same, it is C and the reasoning is this

Is my reasoning not correct?

Thanks

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]

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?

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 separately

Thanks

 

[Steve4Physics]

`IMO none of the given answers are correct and the appropriate answer should be:
chemical → electrical → thermal + mechanical

 

[songoku]

Thank you very much for the help and explanation kuruman, erobz, Steve4Physics

 

[erobz]

Thank you very much for the help and explanation kuruman, erobz, Steve4Physics

If you remember, let us know what the supposed correct answer was when you find out.