A particle of mass m is flying horizontally at velocity u. It strikes a smooth inclined surface and its velocity becomes vertical.
(a) Find the loss in kinetic energy of the particle due to impact if the inclination of the incline is `60^(@)` to the horizontal.
(b) Can the particle go vertically up after collision if inclination of the incline is `30^(@)` ?

Answer

(a) `K_(loss) = (m u^(2))/(3)`
(b) No