Question

A train pulls the boxcars. What are the vertical forces present?(1 point)
Responses

weight, pull of air on boxcars
weight, pull of air on boxcars

weight, push of tracks against wheels
weight, push of tracks against wheels

pull of air on boxcars, push of tracks against wheels
pull of air on boxcars, push of tracks against wheels

weight, friction

Answer 1

weight, push of tracks against wheels