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Afreight train consists of two 8.00×104-kg engines and 45 cars with average masses of 5.50×104 kg . (a) what force must each engine exert backward on the track to accelerate the train at a rate of 5.00×10–2m/s2 if the force of friction is 7.50×105n, assuming the engines exert identical forces?
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Afreight train consists of two 8.00×104-kg engines and 45 cars with average masses of 5.50×104 kg ....
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