When a car experiences a large amount of centripetal acceleration while turning, it creates an inward force that "pushes" the occupants toward the center of the turn. This phenomenon is commonly known as the "centripetal force" or "centripetal effect."
According to Newton's first law of motion, an object at rest or in uniform motion will continue in that state unless acted upon by an external force. In the case of a car making a turn, the car and its occupants naturally tend to continue moving in a straight line due to their inertia. However, the curved path of the turn requires a change in direction, which means an inward force is necessary to keep the car on the curved trajectory.
To provide this inward force, the tires of the car exert a frictional force on the road surface in the opposite direction of the car's motion. This frictional force acts as the centripetal force, directed toward the center of the turn. The car's tires generate this force by utilizing the grip between the tires and the road surface.
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. As the tires push against the road surface to generate the centripetal force, the road surface exerts an equal and opposite force on the tires (and consequently on the car). This reaction force acts as a "push" toward the center of the turn, causing the occupants to feel a sensation of being pushed sideways.
Due to inertia, the occupants of the car tend to resist changes in their motion. As the car turns, their natural tendency is to continue moving in a straight line. However, the centripetal force acting on the car forces it to move in a circular path. As a result, the occupants experience an apparent force pushing them toward the center of the turn, creating the sensation of being pushed sideways.
It's important to note that this inward force is not a real force but rather a perceived force resulting from the car's accelerated motion. In reality, it is the inertia of the occupants that causes them to resist changes in their motion.