Hello, members. When a vehicle moves on the road, it applies a force to the road (action force according to the Newton's 3rd law), road also applies an equal and opposite force on the wheels of the vehicle to cause it to move forward. My question is, is this reaction force frictional force? Normally we say that vehicles move on the road due to friction, can we call it (friction) as a reaction force (provided by the road to the vehicles)? I'm bewildered, need your kind help. Many many thanks.