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Answer to Question #65486 in Other Physics for Steph

Question #65486
A commuter train travels between two downtown stations. Because the stations are only 1.24 km apart, the train never reaches its maximum possible cruising speed. During rush hour the engineer minimizes the travel interval Δt between the two stations by accelerating for a time interval Δt1 at a1 = 0.100 m/s2 and then immediately braking with acceleration a2 = -0.470 m/s2 for a time interval Δt2. Find the time intervals Δt1 and Δt2.
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Assignment Expert
28.09.17, 16:56

Dear Emily,
Since dt_1 = 4.7*dt_2 we have
dt_1 + dt_2 = 4.7*dt_2 + dt_2 = 5.7*dt_2

27.09.17, 21:20

Where did the 5.7 come from?

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