Find time for which train is travelling at constant speed

Reference no: EM13982325

An electric train accelerates uniformly from rest to a speed of 20m/s which it maintains until the brakes are applied. It is then brought to rest by a uniform retardation equal in magnitude to twice its former acceleration. The total distance covered is 7.8 km and time taken is is 7 minutes.

Calculate the time for which the train is travelling at constant speed, the initial acceleration in m/s².

Reference no: EM13982325

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