- #1

brikayyy

- 15

- 0

## Homework Statement

Using the equation for the final velocity of an inelastic collision, show that mechanical energy is not conserved in the collision. (Do this only with variables.)

## Homework Equations

V

_{f}= (m

_{1}v

_{1i}+ m

_{2}v

_{2i})/(m

_{1}+ m

_{2})

KE = (1/2)mv

^{2}

TME = KE + PE

## The Attempt at a Solution

I honestly have no idea where to begin. I thought that maybe I could somehow use the equation of an elastic collision, but the problem says to use the one for inelastic collision.

Should I begin by rewriting the equation to look something like this?

V

_{f}= K

_{f}/K

_{i}= [(1/2)m

_{1}v

_{1i}+ (1/2)m

_{2}v

_{2i}]/[(1/2)(m

_{1}+ m

_{2})]

TME has to equal zero if it's not conserved, right?

--

Thanks for any help provided!