Question 2
The limiting friction between a wooden block and a table is 18 N. The block is pulled horizontally with a force of 10 N. What is the frictional force on the block, and what does the block do?
The right answer is the one marked above.
10 N, and the block stays at rest. 10 N is less than the 18 N limit, so static friction simply matches the pull and the two balance.
18 N is the trap. That is the most friction these surfaces could supply, not the amount they are supplying now. Static friction takes only what it needs.