A freight train consists of two 8.00x104 kg engines and 45 cars with average masses of 5.50x104 kg.  What force must each engine exert backward on the track to accelerate the train at a rate of 5.00x10-2 m/s2 if the force of friction is 7.50x105 N, assuming the engines exert identical forces? Group of answer choices 882 kN 441 kN 221 kN 110 kN

Q: force acting on

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Q: normal force

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.