Is there a force of friction between the wheels of a moving train and iron rails?

cbse
cbse-class-8-science
friction

#1

Is there a force of friction between the wheels of a moving train and iron rails? If yes, name the type of friction. If an air cushion can be introduced between the wheel and the rail, what effect will it have on the friction?
Answer:
Yes, rolling friction. If an air cushion is introduced between the wheel and the rails, the friction will decrease.