Energy associated with object that can be stretched or compressed

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank