The upward force applied by the ground is commonly referred to as the normal force (N). It is the force exerted by a surface to support the weight of an object resting on it.
In the context of a car making a turn, the normal force refers to the force exerted by the road surface on the car. This force acts perpendicular to the surface of contact and counteracts the downward force due to the car's weight.
The value of the normal force depends on the weight of the car and the specific conditions of the turn. In general, the normal force is equal in magnitude but opposite in direction to the weight of the car.
If the car is on a level road with no vertical acceleration (i.e., not going up or down a hill), the normal force is equal to the weight of the car. Mathematically, we can express this as:
N = mg
where N is the normal force, m is the mass of the car, and g is the acceleration due to gravity (approximately 9.8 m/s^2).
However, in the case of a car making a turn on an inclined road or experiencing vertical acceleration, the normal force can differ from the weight. In these situations, additional forces such as the centripetal force or the vertical component of the car's acceleration will affect the normal force.
To determine the exact value of the normal force in a specific scenario, you would need to consider the forces acting on the car and analyze the overall dynamics of the system.