Question 6
If that same table were placed on a very smooth surface such as ice, even a very small force could start it moving. Why?
The right answer is the one marked above.
The resisting force is small enough to ignore, so the whole applied force goes into moving it. Friction is very low on a smooth surface.
So none of the force we apply gets cancelled — all of it contributes as an unbalanced force to the table's motion. It is the same idea as powdering the carrom board.
Neither mass nor gravity changes with the surface. And the ice applies no forward force to the table — it simply resists it less.