Question

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

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
weight, friction

weight, pull of air on boxcars

Answer 1

weight, push of tracks against wheels

(Weight acts downward; the tracks push up on the wheels — all other forces like pull or air resistance act horizontally.)