Question

The tourist was in San Francisco on the Golden Gate Bridge. He wanted to find out how high the bridge's sidewalk was. The tourist had stored a stone in his pocket, which he dropped from the bridge. He measured the phone's clock to see the rock slip into the water four seconds after the drop. Determine the height of the bridge based on a tourist measurement

Answer 1

$$h=0.5gt^2$$

$$h=0.5(9.8)(4)^2=78.4\ m$$