Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. what effect does this have on collisions

The foam floors absorb the kinetic energy on the collisions. This make them safer than the ground for practices of this type, because the impact on the gymnasts will be less harmful.

Other examples of this can be the bumper on a car, which function is to absorb the energy on collisions so the car isn't damaged as much.

explanation:

v=uf/(u-f)

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im guessing the west of station b