Question

A ball is let free from the top of building what is the acceleration and what is its sign?

Answer 1

Answer:

When a ball is let free fall from the top of the building then it's initial velocity will be 0 or it's acceleration will be +9.8 m/s^2.

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Answer 2

Explanation:

initially its velocity is zero since it is at rest but its acceleration is due to gravity(g) so the value is 9.8 m/s2 and its sign will be positive since it is going toward earth surface... so the value is +9.8 m/s2