Find the value of the spring constant for the spring in Trial I. Use 0.367 s for the value of the period. The mass of the suspended block is 0.400 kg.

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?