Question 7
Which statement about static friction is correct?
The right answer is the one marked above.
It adjusts itself to equal the applied force, up to a maximum. Push with 5 N and it answers with 5 N; push with 12 N and it answers with 12 N.
"Grows without any limit" is the near miss. If that were true nothing could ever be made to move by pushing it — and the maximum it can reach is precisely the limiting friction.