A ball is dropped from a height of 20m. How long does it take for the ball to reach ground?

Use SUVAT. Height is 20m, initial speed is 0m/s, acceleration is 10m/s^2, and you need to find time. Therefore use s = ut + 1/2 at^2, and rearrange to get a value for t as t = 2s.

Answered by Lauren T. Physics tutor

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