The car weighs more on the carpet. The car weighs more on the floor. The carpet has more resistance. The floor has more traction.
I gave my students this multiple choice question: What is the most reasonable explanation for why a toy car rolls farther on a wood floor than on a thick carpet?

Only one answer is correct among these 4 choices:
- The car weighs more on the carpet.
- The car weighs more on the floor.
- The carpet has more resistance.
- The floor has more traction.

Could you tell me which one is correct?

The carpet has more resistance.