Question

Physicists often measure the momentum of subatomic particles moving near the speed of light in units of MeV/c, where c is the speed of light, and

1 MeV = 1.6 ✕ 10^-13 kg · m^2/s^2 .

A-Based on this, what are the units of momentum for a high-speed subatomic particle in terms of fundamental SI units?

B-
What are the units of momentum for a high-speed subatomic particle in terms of a newton and another fundamental SI unit?

Answer 1

A) . As momentum is equal to :energy/velocity.thenthe unit of momentum of high speed sub atomic partical in term of SI unit is :- joule . Second/meter . (J . s/m)

B) . We know the force is equal to change in momentum with respect to time,

so, force = momentum/ time

momentum= force ×time

Then we can say the unit of high speed sub atomic partical in terms of Newton unit is:- Newton. Second (N.S)

In general momentum = mass× velocity

So unit of momentum in fundamental SI unit is:- Kg.m/s