What is another word for retarding force?
Pronunciation: [ɹɪtˈɑːdɪŋ fˈɔːs] (IPA) 
A retarding force refers to any resistance or opposing motion that slows down or halts an object's movement. There are several synonyms for this term, including drag, resistance, friction, impediment, and hindrance. Drag refers to the force of air or water against an object in motion, slowing it down. Resistance is any opposing force acting against motion. Friction is the force that resists motion between two surfaces in contact. Impediment signifies an obstacle or barrier to the object's movement. Finally, hindrance is any factor that inhibits or obstructs an object's progress. These words all reflect the same concept of some force slowing down or stopping an object's motion.
