The collision alarm sounds, and the commander detonates a charge, releasing one of the modules at a speed of 1400 km/h with respect to the station, directed opposite to the original direction of travel of the station. Find the resulting change in the speed of the station.

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A space station contains 11 modules each with a mass of 13 000 kg, moves at a speed of 4.0
km/s. It is equipped with an emergency collision avoidance system whereby an explosive charge
can be detonated to release one of the modules. The collision alarm sounds, and the
commander detonates a charge, releasing one of the modules at a speed of 1400 km/h
with respect to the station, directed opposite to the original direction of travel of the station.
Find the resulting change in the speed of the station.

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