Football helmets are made with padding that reduce head injuries when a player collides with an object. which best explains how the padding reduces injuries? it extends the time of the collision. it reduces the time of the collision. it eliminates the reaction force of the object. it eliminates the action force of the object.

It eliminates the reaction force of the object.

Explanation:

It eliminates the reaction force of the object by dissipating the energy on the compression of the padding material and distributing the force of impact over the large surface area. As less area would generate more stress by the force.

We know by the equation:

where F & A are force and area respectively.

Also the compression of material absorbs energy in the form of elastic potential energy given by the equation:

where:

k= elastic constant

= change in the dimension of the elastic materiel

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.