#5 Two of their classmates join in on the discussion: Student 3: There have to be more than just four types of forces. What about tension, or friction, or air resistance? What about the force of a hammer hitting a nail? I don't see where any of those fit into the list of fundamental forces. Student 4: But they must be in there somewhere. All of the forces you mentioned involve objects, but objects are made of particles - which can only interact via the four fundamental forces. So maybe we can figure this out. Most of the forces you mentioned seem like they're repulsive, with the objects being pushed away from each other. What fundamental force has that property? Do you agree or disagree with either or both of the students? And what fundamental force could they be describing? Explain your reasoning on both points.

#5 Two of their classmates join in on the discussion: Student 3: There have to be more than just four types of forces. What about tension, or friction, or air resistance? What about the force of a hammer hitting a nail? I don't see where any of those fit into the list of fundamental forces. Student 4: But they must be in there somewhere. All of the forces you mentioned involve objects, but objects are made of particles - which can only interact via the four fundamental forces. So maybe we can figure this out. Most of the forces you mentioned seem like they're repulsive, with the objects being pushed away from each other. What fundamental force has that property? Do you agree or disagree with either or both of the students? And what fundamental force could they be describing? Explain your reasoning on both points.