Two inclined planes intersect in a horizontal plane. Their inclination to the horizontal is α and β. If a particle is projected at right angles to the former from a point in it so as to strike the other at right angles, then find the velocity of projection. Assume that the particle undergoes a vertical displacement of 'h' during its motion.
Thanks for the link. But I couldnt understand "particle undergoes a vertical displacement 'h' during its motion." I am enclosing a diagram. Can anyone point out where 'h' is supposed to be?