80 railway wagons all of same mass 5 x 10 kg are pulled by

Last updated: 6/25/2023

80 railway wagons all of same mass 5 x 10 kg are pulled by an engine with a forc of 4 x 105 N The tension in the coupling between 30th and 31st wagon from th engine is A 25 x 104 N 1 B 20 104 N D 40 104 N To one of its ends a mass of 3kg C 32 104 N X