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Unformatted text preview: May 30, 2008 PHY2053 Discussion Quiz 2 (Chapter 2) Name: UFID: *1. (5pts) A motorist drives north for 45.0 minutes at 80.0 km/h and then stops for 20.0 minutes. He/she continues north traveling 140 km in 2.00 hours. What is his/her average velocity? The average velocity is defined as total displacement/elapsed time. The total displacement is 80 km/h × 3/4 h + 140 km = 200 km north, where we converted minutes to hours. The elapsed time is 3/4 h + 1/3 h + 2h = 3.08 h Thus the average velocity is 200/3.08 = 64.9 km/h north **2. (5pts) A tortoise can run with a speed of 0.300 m/s and a hare can run at 2.00 m/s. In a race, they both start at the same time, but the hare stops to rest for 3.00 minutes. The hare wins by 5.00 m. Find the running time of the hare (the time for which the The hare wins by 5....
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 Fall '06
 Buchler
 Physics, Acceleration, running time, Hikaru Utada

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