Exam-1-10

# Exam-1-10 - LAST NAME First name and initial DO NOT OPEN...

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Problem 1 There are about 3.2 billion people in China. If they all simultaneously jump up, estimate the change in the speed of the Earth right after they leave the ground. Make reasonable assumptions if necessary. The mass of Earth is 6 × 10 24 kg. A) 10 -18 m/s B) 10 -10 m/s C) 10 -6 m/s D) 10 -14 m/s E) 10 -2 m/s Problems 2-3: 39-year-old Zhang Xinquan from Dehui city, Jilin province of China, was capable of pulling a 24,000 kg train 40 meters in 4 minutes with just his right ear. Assume that there was no friction, the tracks were horizontal, the train was initially at rest and that Zhang applied a constant force during the 4 minutes of pull. Problem 2
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Exam-1-10 - LAST NAME First name and initial DO NOT OPEN...

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