In biomechanical terms, how does force of impact behave on non-resistive surfaces?

When considering the behavior of impact force on non-resistive surfaces, it's essential to understand how surface area interacts with force distribution. On non-resistive surfaces, such as sand or grass, when the surface area of the object impacting the ground increases, the force of impact is distributed over a larger area. This distribution leads to a decrease in pressure (force per unit area) at any given point.

As a result, while the total force of impact may not necessarily decrease, the sensation or effect of that force can be perceived as less severe due to the larger area absorbing and dissipating the energy of the impact. This explains why the impact force behaves in a way that decreases when surface area increases—it reduces localized stress and potential injury risk.

In biomechanical terms, this principle is crucial for athletes and trainers, as it influences decisions regarding the types of surfaces used for training and competition to minimize injury and maximize performance.