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Like all quarks, the up quark is an elementary fermion with spin, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions.
They are affected by all four of the fundamental forces, which are gravity, the strong force, the weak force, and electromagnetism. <SEP> Like all quarks, Up quarks are elementary particles, which means that they are so small that scientists believe that they cannot be divided any more.