sentences:  a static, uniform net force normal to level ground, this is simply the object's weight divided by contact area.The ground pressure of motorized vehicles is often compared to the ground pressure of a human foot, which can be 60 – 80 kPa while walking or as much as 13 MPa for a person in spike heels.Increasing the size of the contact area on the ground (the "footprint") in relation to the weight decreases the ground pressure.