Question

A projectile is thrown from the bottom of an inclined plane of inclination theta. Find the angle of projection so that it hits the inclined plane perpendicularly.​

Answer 1

Answer:

Explanation: It is solved using formula for time of flight on inclined plane and by the condition that it collide perpendicularly, so finally the velocity in the direction of x i.e along inclined plane is zero(0). See the image.