We comment on the article ‘Wind-influenced projectile motion’ by Bernardo et al (2015 Eur. J. Phys.
36 [http://dx.doi.org/10.1088/0143-0807/025016] 025016 ) where they examine the trajectory of a
particle that is subjected to gravity and a linear air resistance plus the influence from the wind.
They find by using the Lambert W function that the particleʼs trajectory for a special angle, the
critical angle ##IMG## [http://ej.iop.org/images/0143-0807/36/6/068003/ejp519096ieqn1.gif] {${theta
}_{{rm{C}}}$} , between the initial velocity and the horizontal is part of a straight line. In this
comment we will show that this result can be proved without using the Lambert W function which is
not that well known to beginning students of physics.