Kronenberg et al. develop a system to record cell–substrate interactions allowing the measurement of horizontal and vertical forces at high resolution, and demonstrate its use by ...

When normal elastohydrodynamic contact forces are taken into account (without solid friction), these simulations capture continuous shear thickening and large increase in suspension viscosity 13.

The last force is the kinetic friction force—it's parallel to the surface. It is this frictional force that slows down the car (since there is no other horizontal force).