From the top floor of a very high building, a kid drops a ball. Estimate the magnitude of the acceleration of the ball right after its collision with the ground **in \(m/s^2\)**.

**Details and assumptions**

- Assume that the collision is perfectly elastic.
- The acceleration due to gravity is \(-9.8~m/s^2\).
- Do
**NOT**neglect the effects of air resistance.

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