lec10 - Physics 140 Fall 2007 lecture #10 : 4 Oct Ch 7...

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Physics 140 – Fall 2007 lecture #10 : 4 Oct • first midterm exam is TONIGHT, 6:00-7:30 pm check out the New York Times Special Science Section Ch 7 topics: • potential energy • mechanical energy Happy 50th Anniversary Sputnik! Where are you from? You are from 21 : Ann Arbor 237 : Michigan palm 6 : Michigan UP 94 : USA(outside MI), E of Mississippi river 35 : USA(outside MI), W of Mississippi river 29 : Outside USA 1 : Saturn 422 : total
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The arrows in this graphic give the force exerted on the left pedal of a test bicycle by seven-time Tour de France winner Lance Armstrong. Assuming that the pedal cadence (or spin rate) is nearly constant, rank the points labeled by the power applied at those locations, least to greatest 1. A, D, C, B 2. A, D, B, C 3. D, A, C, B 4. D, C, B, A 5. A, B, C, D From “Training the Olympic Athlete” by J. Kearney, Sci American, June 1996, p55. A B C D h v 0 h case 3 case 2 case 1 Consider the motion of a ball thrown with initial velocity v 0 in the three cases shown: 1. thrown straight down; 2. tied to a string and launched downward or 3. upward.
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lec10 - Physics 140 Fall 2007 lecture #10 : 4 Oct Ch 7...

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