When two bodies collide, they experience forces in _________.

When two bodies come into contact, one feels a contact force from the other. Friction is defined as the component of the contact force that opposes impending or actual relative motion between the two surfaces in contact.

The two bodies in contact will follow Newton’s third law of motion. The third law states that for every action there is an equal and opposite reaction. The two bodies will experience each other’s reaction forces in opposite directions.