The curved section of a horizontal highway is a circular unbanked arc of radius 740 m. If the coefficient of static friction between this roadway and typical tires is 0.40,
what would be the maximum safe driving speed for this horizontal curved section of highway?
A) 54 m/s
B) 52 m/s
C) 50 m/s
D) 48 m/s
E) 46 m/s
A
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According to Kepler’s First Law, all planets have orbits about the Sun that are
A. circles B. squares C. parabolas D. ellipses
Uniform Circular Motion: A child sits on a merry-go-round, 1.5 meters from the center. The merry-go-round is turning at a constant rate, and the child is observed to have a radial acceleration of 2.3 m/s2. How long does it take for the merry-go-round to make one revolution?
Fill in the blank(s) with the appropriate word(s).
The body of a swimmer occupies a volume of 2 cubic feet. What is the buoyant force when the swimmer is immersed in water? (The weight density of water is 62.4 pounds per cubic foot.)
When uranium fissions into two medium-mass nuclei, the product nuclei tend to have an excess of neutrons when compared to stable nuclei. What type of radioactive decay would one expect from these product nuclei?
a. meson decay b. negative beta decay c. positive beta decay d. proton decay