Question: A train is initially traveling along a straight track at a speed of 90 km/h. For 6 s it is subjected to a constant deceleration

A train is initially traveling along a straight track at a speed of 90 km/h. For 6 s it is subjected to a constant deceleration of 0.5 m/s², and then for the next 5 s it has a constant deceleration a_c. Determine a_c so that the train stops at the end of the 11-s time period.

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