AP 2007 FRQ Answers needed please!

<p>In pdf format or post them here. Thanks.
For physics C mechanics and E&M.</p>

<p>AP:</a> Physics C</p>

<p>I didn't notice the answer key at the bottom of the page. Thanks!</p>

<p>Can anybody explain E&M 2007 FRQ #1 part F better than the answer key?</p>

<p><a href="http://www.collegeboard.com/prod_downloads/ap/students/physics/ap07_sg_physics_c_em.pdf%5B/url%5D"&gt;http://www.collegeboard.com/prod_downloads/ap/students/physics/ap07_sg_physics_c_em.pdf&lt;/a&gt;&lt;/p>

<p>^^Scroll to question 1 part f to see what I am talking about.</p>