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# 9a - what is the radius of the circle What is the...

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PHY2053 – Section 7392 Quiz #9 Friday, March 19, 2004 Name_______________________________ UFID___________________ Please read the problem carefully and be sure to show all of your work. Partial credit will be given. In civil aviation, a “standard turn” for level flight of an airplane is one in which the airplane makes a complete circular turn in 2.0 minutes. If the planes speed is 200 m/s,
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Unformatted text preview: what is the radius of the circle? What is the centripetal acceleration of the airplane? (Useful info: the circumference of a circle is 2 π times the radius.) Solution: First, find the angular velocity: ω = 2 π / 120 s = 5.24 x 10-2 rad/s From this, find the radius: r = v/ = 200/5.24 x 10-2 = 3820 m The centripetal acceleration is: a c = v 2 /r = 10.5 m/s 2...
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