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A car rounds a flat curve of radius 80 m with µs = 0.5 and g = 10 m/s². Maximum safe speed?
A10 m/s
B15 m/s
C25 m/s
D20 m/s
Answer & Solution
Correct answer: D. 20 m/s
v max = sqrt(µs R g) = sqrt(0.5 x 80 x 10) = sqrt(400) = 20 m/s.
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