Question

The answer to this question^

Answer 1

The gravitational force can be affected because of the distance being either closer or farther away from the sun.

Answer 2

The acceleration of gravity on earth is 9.8 m/s² so there fore F=m/a which is 80/9.8 and = to 8N, but the mercury have higher acceleration of gravity than earth. So the density of mercury is high that is why the weight on mercury is = to Mars.