Question

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

Answer 1

The height of bridge is
`17\ m`

Step-by-step explanation:

Given the time taken to reach the ground is
`3.4\ second`

And acceleration of gravity
`10\ m/s^2`

Also the initial velocity of the object
`u=0\ m/s`

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
`S` is the height,
`t` is time of fall, and
`g` is acceleration of gravity.

`S=(gt^2)/(2)\\\\S=(10*3.4)/(2)\\S=17\ m`