The given figure shows a man trailing a trolley bag. Suddenly, the wheels of the trolley bag get locked. The man realizes that he has to put extra effort to drag the bag. The man finds it difficult to drag because.

At work claire has a deadline that is rapidly approaching as she works she finds that she is doing more work in a shorter amount of time than usual she thinks more quickly and her senses and memory are sharper what is responsible for claire working more efficiently