A curved road is 7.5m wide and its outer edge is raised by 1.5m over the inner edge. The radius of curvature is 50m. For what speed of the car is this road suited?(g=10m/s2):
5m/s
10m/s
15m/s
20m/s
A
15m/s
B
20m/s
C
5m/s
D
10m/s
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Solution
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Nsinθ=mv2R
Ncosθ=mg
tanθ=v2rg
tanθ=1.57.5
15=v250×10
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