A ball falls on an inclined plane of inclination θ from a height h above the point of impact and makes a perfectly elastic Collision. Where will it hit the plane again?

Angle of inclination on the plane is Ө,


The body falls through the height h,


Acceleration due to gravity g = 10 m/s,


The striking velocity of the projectile with the inclined plane is



Now, the projectile makes an angle of



Velocity of projection will be,



Let AB=l,


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So,



From equation of trajectory






So,








Thus, it will hit the plane again at 8h sin θ along the incline.


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