Sophia's Bibiliography:

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"All Work and No Play." Physics4Kids.com: Motion: Work. N.p., n.d. Web. 03 Apr. 2013.WebsiteLink

"Engineering Interact - Interactive Science & Engineering for 9-11 Year Olds." Engineering Interact - Interactive Science & Engineering for 9-11 Year Olds. N.p., n.d. Web. 03 Apr. 2013.WebsiteLink

"Friction Basics." Physics4Kids.com: Motion: Friction. N.p., n.d. Web. 03 Apr. 2013.WebsiteLink

"Lubricant." Wikipedia. Wikimedia Foundation, 04 Mar. 2013. Web. 03 Apr. 2013.WebsiteLink

Lampson, Nathan."Mechanical Efficiency." Sophia. N.p., n.d. Web. 03 Apr. 2013.WebsiteLink

"Powered By OnCourse Systems For Education." Powered By OnCourse Systems For Education. N.p., n.d. Web. 03 Apr. 2013.WebsiteLink

Sheellap. "Friction." YouTube. YouTube, 13 Nov. 2007. Web. 03 Apr. 2013.WebsiteLink

"Tumblr." Smiley Face. N.p., n.d. Web. 03 Apr. 2013.Website[[@http://www.tumblr.com/tagged/smiley face|Link]]

"What Are the Pros and Cons of Having Friction?" Yahoo! Answers. Yahoo!, n.d. Web. 03 Apr. 2013.WebsiteLink