Reach for the Summit - P-S1-A3

As shown above, the point OO is H mH\text{ m} away from the ground. Two balls 11 and 22 are thrown at point OO horizontally, so that ball 11 merely passes the top of the fence and falls at point BB, ball 22 is bounced by the ground once and then merely passes the top of the fence and falls at point BB.

If the collision of ball 22 and ground is elastic, find the height of the fence h mh\text{ m}.

The result is h=λHh=\lambda H, submit 1000λ\lfloor 1000\lambda \rfloor.


Reach for the Summit problem set - Physics

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