Question

1. what is the force that opposes motion of objects? for example, pushing a sofa requires overcoming this force. friction

Explanation:

Friction is a force that resists relative motion between two surfaces in contact. It acts in the direction opposite to the motion or tendency of motion of an object. For example, when pushing a sofa as shown in the image, friction between the sofa and the floor opposes the motion.

Answer:

Friction