- #1

jdawg

- 367

- 2

## Homework Statement

In this experiment we tied a cart to a hanging mass and measured the velocity as it passed through a gate, and recorded the mass of the cart. I calculated the potential and kinetic energy of the hanging mass and when I subtracted the potential from the kinetic, I got a negative number. Does this mean that energy was lost? Do these results make sense? Please let me know if I wasn't descriptive enough of the scenario!

## Homework Equations

K=(1/2)mv

^{2}

U=mgh

K-U

## The Attempt at a Solution

Here is what I did for trial 1 (all of the units are what they need to be for the formula to work):

Calculating Kinetic Energy:

K=(1/2)(0.075)(1.23)

^{2}=0.0567 J

Calculating Potential Energy:

U=(0.075)(9.8)(0.86) =0.6321

The difference:

0.0567-0.6321= -0.575