4m particle Mass 4m rest particle which explodes three fragments each two A particle of mass `4m` which is at rest explodes into four equal
A particle of mass 4m which is at rest explodes in to three fragments
A particle of mass 4m which is at rest explodes in to three fragments
A particle of mass 4m which is at rest explodes in to three fragments
A particle of mass `4m` which is at rest explodes into four equal