200 followers problem

If distance between the two points on the fixed smooth inclined plane on which the ball makes first and second collision can be represented as Δ\Delta.

Find Δ\sqrt{\Delta}.


  • Collisions are perfectly elastic. -surface of inclined plane is smooth.
  • No air resistance.
  • h=25m,B=30h=25m,B=30^{\circ}

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