Question

6. An airplane has a speed of 120 km/h degrees east of north when a wind start 2: Long Answer (15 points) Two trains, both traveling at 30 m/s, are headed toward each other on the same track. When they are 4.0 km apart they see each other and slam on the brakes a) If their decelerations are constant and equal, what must be the magnitudes of these accelerations if the trains are to barely avoid collision? b) How many seconds will it take from when they see each other until they almost hit? AN a)

Answer 1

a)if we assume that both the trains are under constant decelerations thedistanceit has for each of the train to stop-d-2.0km initital velocity-v-30.0m ;a-deceleration of each train ->a-0.225 2d b)timeit will take for each train tostopfrom thetime breakes applied-t weplug the values in hand while using therelation gives 2d133.3sec