An object is dropped from a bridge. it is recorded to take 3.4 seconds to reach the ground. how high is the bridge? assume the acceleration of gravity is 10m/sec2

The height of bridge is

Explanation:

Given the time taken to reach the ground is

And acceleration of gravity

Also the initial velocity of the object

The object is falling under the condition of free fall.

So, we can use the following formula for computing the distance when the object is under free fall.

Where is the height, is time of fall, and is acceleration of gravity.

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.