Answer:
Friction and Inertia
Explanation:
Friction - Friction causes a force on a surface which is in the opposite direction to its motion. Example: applying the brakes in a car.
Inertia - An object will stay in motion and an object at rest will stay at rest unless acted upon by an outside force. Example: Why your book stays still on the table if you don't touch it, or why you shoot forward when brakes are applied in a car.
