Posted by **Cin** on Sunday, August 26, 2012 at 2:44pm.

A person drops a small rock from a bridge. If it takes 1.70 seconds for the rock to reach the water below the bridge, how high was the bridge above the water? please explain.

- Physics -
**drwls**, Sunday, August 26, 2012 at 2:54pm
The distance it falls in t seconds after being dropped is

H = (1/2) g t^2

g is the acceleration of gravity, which you must have learned about by now. It is 9.8 m/s^2 on Earth.

Set t = 1.7 seconds and use the formault to solve for the height, H, in meters.

## Answer This Question

## Related Questions

- Physics - A rock is dropped from a bridge to the water below. It takes 2.40 s ...
- Physics - A student drops a rock off a bridge. The rock has a mass of 5.81 kg. ...
- physics - A rock is dropped from a bridge to the water below. It takes 2.4s to ...
- Physics 270-1 Applied - A rock is thrown down with an initial speed of 30.0ft/s ...
- Physics - A rock thrown from a bridge hits hte water below at a horizontal ...
- physics - A rock thrown horizontally from a bridge hits the water below at a ...
- Calculus - A rock is thrown upward off a bridge. In 2sec. the rock passes you on...
- physics - A rock is dropped from bridge to the water below. It take 2.4s to hit ...
- physics - You're on a magic bridge floating 25 meters above a lake. You through...
- physics - A rock is dropped off of a bridge into the water below. If the ...

More Related Questions