PHY 205 NAME: I. The 65 kg man in the roller coaster car is sitting on a bathroo
ID: 777112 • Letter: P
Question
PHY 205 NAME: I. The 65 kg man in the roller coaster car is sitting on a bathroom scale. If he is traveling at 37.7 m/s at the ewton what does the point shown and the radius of the vertical coaster track is 54 meters, to the nearest n scale read (what is his normal force, Fs)? 2. What is the answer to the previous problem if the roller coaster is at the bottom of the track? 3. If the Earth's period is 365.25 days and its distance to the (center of the) Sun is one astronomical unit (AU), what i the ero toseroid n cirular orbi 3.23 AU? 4. How fast (in rpm) must a centrifuge rotate if a particle 9.00 em from the axis of rotation is to experience an acceleration of 115,000 g's?Explanation / Answer
4. here use a = r W^2
W^2 = a/r
W^2 = 115000 * 9.81/0.09
W = 3540.48 rad/s
1 rpm = 2pi/60 rads
1rad/s = (1/2pi) rev/s
W = 3540.48 * 60/2pi
W = 33826.24 rpm
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