the same weight and the same mass. a larger weight, but smaller mass. a smaller mass and larger weight. a smaller weight and the same mass.
I gave my students this multiple choice question: The rover Spirit is a robotic probe that NASA has placed on Mars. The gravitational attraction of Mars is approximately 62% less than that of Earth. Compared to its measurements on Earth, on Mars the probe has

Only one answer is correct among these 4 choices:
- the same weight and the same mass.
- a larger weight, but smaller mass.
- a smaller mass and larger weight.
- a smaller weight and the same mass.

Could you tell me which one is correct?

a smaller weight and the same mass.