In which of the following situation is work being done? a car is pushed but does not budge. a weightlifter holds a barbell over his head. a wagon is pulled at an angle of 30 degrees to the horizontal. a swimmer treads water for 15 minutes.

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?