There's the acceleration of the car that provides a force and the normal force of the seat cushion which pushes upwards against the passenger
<span>Shading.
When light hits an opaque surface some is absorbed, the rest is reflected, The reflected light is called shading. Reflection is not simple and varies with material.
The surface’s structure defines the details of reflection. Variations produce anything from bright specular reflection</span>
The max is the largest it could get so ( ,0)
