joules kilowatts kilometers volts
I gave my students this multiple choice question: Sandy and Keith plan to move a 6-kilogram block. If they wanted to calculate the mechanical energy required to move the block, what units would they use to report their answer?

Only one answer is correct among these 4 choices:
- joules
- kilowatts
- kilometers
- volts

Could you tell me which one is correct?

joules