2 identical steel balls fell from the same height. One fell into a box of sand, and the other hit the table

2 identical steel balls fell from the same height. One fell into a box of sand, and the other hit the table, bounced off it and was caught. Which of the balls has the most changed internal energy?

Let’s consider both cases:

In the first case, the ball fell into the sand and got stuck in it. In this case, the kinetic energy of the ball, which it possessed before the moment of contact with the sand, completely passed into the internal energy of the ball.

In the second case, the ball bounced off the table, bounced off it and was caught at a certain height. At the same time, part of the energy also passed into the internal one, but since it was caught at a certain height, then some part of the energy remained in the form of potential.

Since in the first case all the energy of the ball passed into the internal one, this is the correct answer.