A car starts moving rectilinearly, first with acceleration w=5.0 ms−2 (the initial velocity is equal to zero), then uniformly, and finally, decelerating at the same rate w, comes to a stop. The total time of motion equals τ=25 s. The average velocity during that time is equal to ⟨v⟩=72 km h−1. How long does the car move uniformly?