A ball dropped from a bridge takes 3.0 seconds to reach the water below. How far is the bridge from the water?

Question

Physics

Danica Wilkins

27 November, 01:15

A ball dropped from a bridge takes 3.0 seconds to reach the water below. How far is the bridge from the water?

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Answers (1)

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Annie Barnes · Answer 1

Since it is dropped, initial velocity u = 0

Using s = ut + (1/2) gt^2, putting u = 0, g = 10 m/s^2

s = (1/2) gt^2, t = 3s

s = 0.5 * 10 * 3 * 3

s = 45 m.

The bridge is 45m above the water.