Electron,proton, neutron and alpha particle have same momentum which particle has more kinetic energy?
2 Answers
Aug 9, 2018
Smaller the mass of the particle, larger its kinetic energy.
Explanation:
Let
and as kinetic energy (
i.e.
Hence smaller the mass of the particle, larger its kinetic energy
i.e. electron has most kinetic energy.
Aug 9, 2018
Kinetic energy in terms of momentum
#KE=|vecp|^2/(2m)#
where#m# is the mass of particle.
It is given that momentum of all four particles Electron, proton, neutron and alpha particle is same. Above expression reduces to
#KEprop1/m#
Out of given particles, electron has the lowest mass. Therefore, electron has the maximum kinetic energy.