Question

in this example, the \a\ of the earth movement would have to be
not zero, but, very, very close to zero.
zero
9.8 m/s²
rewatch

Explanation:

The Earth is in constant motion, such as its orbit around the Sun and rotation on its axis. There are gravitational - related accelerations and other dynamic factors at play. It is not at rest (so acceleration is not zero), and 9.8 m/s² is the acceleration due to gravity near the Earth's surface, not related to the overall Earth - movement acceleration in this context. The Earth's acceleration in its general movement is non - zero but very small in some cases due to the large scale and long - term nature of its motion.

Answer:

Not zero, but, very, very close to zero.