Question

1. the motion of an object is called inertia. what force works against an object in motion, or inertia?

friction
gravity
transition
normal

Explanation:

Friction is a force that opposes the relative motion between two surfaces in contact. Gravity is a force of attraction between objects with mass. Transition is not a force. The normal force is perpendicular to the surface and supports an object's weight. Since the question asks for a force against motion (inertia), friction fits as it resists movement.

Answer:

Friction