Answer:
h2 = 0.092m
Explanation:
From a balance of energy from point A to point B, we get speed before the collision:
Solving for Vb:

Since the collision is elastic, we now that velocity of bead 1 after the collision is given by:

Now, by doing another balance of energy from the instant after the collision, to the point where bead 1 stops, we get the distance it rises:
Solving for h2:
h2 = 0.092m
6.35x10^-4 OR 6.3x10-4 (if only one decimal number is allowed)
It's called sedimentation. And erosion is when the rock is worn away by the water, and wind and becomes sediment.