# What is the kinetic energy of an object with a mass of #1 kg# that has been in freefall for #2 s#?

##### 1 Answer

I found

#### Explanation:

We can either:

1) use kinematic to find the final velocity after

using:

where

We get:

From this we get:

Kinetic Energy:

or:

2) use kinematic (and Conservation of Energy) to find the vertical distance described after

using:

Where we set

giving:

so that the height (from ground) will be:

At this position the object had a Potential Energy of: