Question $51(2$ points$)$

A locomotive is pulling three wagons along a level track with a force of $100,000$ N$.$ The wagon next to the locomotive has a mass of $70,000kg,$ the next one, $50,000kg,$ and the last one, $80,000kg.$ Neglect friction. What is the force between the $80,000-$ kg and $50,000-$kg wagons?

$40,000$ N

$50,000$ N

$65,000$ N

$60,000$ N

$35,000$ N