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Discussion-11

# Discussion-11 - Work WorkandEnergy Discussion#11 Ch.6.4 6.9...

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Work and Energy Di i #11 Ch 6 4 6 9 Discussion #11 – Ch. 6.4 – 6.9 Physics 125 – Fall 2010 Dr. Mike Melnichuk [email protected] Office: 2409 Randall Lab [email protected] Office Hours: 2:00 4:00 / Mon & Tue in Rm 1416 Randall Lab Office Hours: 2:00 – 4:00 / Mon. & Tue. in Rm. 1416 Randall Lab.

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Example #1 Millennium Force (Cedar Point, Sandusky, Ohio) is one of the tallest roller coasters in the world. As shown in the comparison below, the highest point (A) on the track is 310 ft = 94m above the ground. The lowest point (B), at the bottom of the first drop, 310 ft 94m above the ground. The lowest point (B), at the bottom of the first drop, is approximately 15ft = 5m above the ground. What are the expressions for the total (mechanical) energy initial and final, respectively? 2 2 1 1 0 2 2 i i i A A A A A E KE PE KE PE mv mgh m mgh = + = + = + = + 2 1 2 f f f B B B B E KE PE KE PE mv mgh = + = + = +