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An engine pulls a train of 20 frieght cars each having a mass of 5.0*10^4 kg with a constant force. The cars move from rest to a speed of 4.5 m/s in 19.7s on a straight track. Neglecting friction, the force with which the tenth car pulls the eleventh one (at the middle ofthe train) is ____ N in the direction of motion.
15 years ago

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bobpursley
Find acceleration.
then, Forceoneleventh= (mass11+ mass12+ ...)a
15 years ago

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