Question

If a baseball is dropped from a skyscraper,

what will its speed (velocity) be after 4.5
seconds (assuming no air resistance)?

Answer 1

44.1m/sec

Explanation:

Ah, falling objects!

We know that the initial velocity is 0

because it was maintained by the skyscraper at time zero.

We also know that objects accelerate uniformly at 9.8 m/s

Because he did it for 4.5s,

multiply them:

9.8m/s (4.5s) = 44.1m/s

This would be its final velocity since the initial velocity was zero