- #1

erinec

- 31

- 0

## Homework Statement

A proton and an alpha-particle are fired directly toward each

other from far away each with an initial speed of 0.01c.

Determine their distance of closest approach measured between

their centres.

## Homework Equations

See below.

## The Attempt at a Solution

What I did was..

Kinetic Energy of the system = Potential Energy of the system

(.5*m

_{p}*v

^{2}) + (.5*m

_{He}*v

^{2}) = k*q

_{p}*q

_{He}/ r

and then I solved for r, which gave me an incorrect answer.

What am I doing wrong?

I am just wondering.. could you please try this question and tell me what you get?

I get 1.16*10

^{5}...

which is not the correct answer..

The correct answer is 19.2 fm.;;;