Why is your body pressed against the left side of seat when roller coaster car in which you are riding suddenly veers to right?

Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity in a straight line unless acted upon by an external force. When the roller coaster car in which you are riding suddenly veers to the right, your body initially continues to move in the original direction due to inertia. This causes your body to be pressed against the left side of the seat as the car changes direction.