A small metal ball with a mass of m = 82.5 g is attached to a string of length l = 1.30 m. It is held at an angle of ? = 56.3° with respect to the vertical.
The ball is then released. When the rope is vertical, the ball
collides head-on and perfectly elastically with an identical ball
originally at rest. This second ball flies off with a horizontal
initial velocity from a height of h = 3.87 m, and then later
it
hits the ground. At what
distance x will the ball land?
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