If a nucleus captures a stray neutron, it must bring the neutron to a stop within the diameter of the nucleus by means of the 'strong force'. That force, which 'glues' the nucleus together, is essentially zero outside the nucleus. Suppose that a stray neutron with an initial speed of 2.8×107 m/s is just barely captured by a nucleus with diameter d = 1.0×10-14 m. Assuming that the force on the neutron is constant, find the magnitude of that force. The neutron's mass is 1.67×10-27 kg.
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