Entry Test MCQ :: Work And Energy

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Proton electron neutron and a particles have same momentum. Which of them have highest K.E?

[A].	Proton	[B].	electron
[C].	neutron	[D].	a-particle

Answer: Option B

saira said:

Plz tell me how electron has highest k.e energy

ali said:

according to equation 2mK.E=P^2 K.E is inversly proportional to mass if momentum is same. so electron ka mass is least so ke is maxx

tooba said:

how is it possible if KE and mass are directly related?