Question

A particle is projected from the bottom of an inclined
plane & inclination 30° (with the horizontal) with speed
40 m/s at an angle 60° with the horizontal. The speed of
the particle when its velocity vector is parallel to inclined
plane is (g = 10 m/s)
(a)40/√3
(b) 20 m/s
(c) 20√3 m/s
(d) 10 m/s​

Answer 1

Explanation:

refer the explanation above