Calculate velocity of a 1MeV Neutron

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How would one calculate the velocity of a 1MeV neutron??

I tried the following the attached formula for V/C but E is less than the rest mass which yields the square root of a negative number. Not sure what to do for this
 

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1 MeV here is surely the kinetic energy, not the total (rest plus kinetic) energy.
 
It doesn't say. I guess that I will assume such. Is the 'E' in the equation I am using for the rest mass energy plus the kinetic energy?
 
Since a neutron has a higher rest mass than 1MeV, then one should safely assume that kinetic energy is what is meant here.

The E in that equation is indeed the rest+kinetic energy.
 
Since the neutron rest mass is approximately 940 Mev, you probably could use E=(mv^2)/2 to get v. (v=c/22?).
 
Last edited:
mathman said:
Since the neutron rest mass is approximately 940 Mev, you probably could use E=(mv^2)/2 to get v. (v=c/22?).
I agree that a nonrelativistic approach should be fine - it is a very good approximation.
 

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