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physgrl
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Homework Statement
At what angle should the roadway on a curve with a 50 m radius be banked to allow cars to negotiate the curve at 12 m/s even if the roadway is frictionless?
a. 0°
b. 12.2°
c. 17.1°
d. 35.0°
e. 73.2°
Homework Equations
β=arctan(v^2/r*g)
The Attempt at a Solution
im using β=arctan(v^2/r*g) but the key says the answer is b?
can anyone help me figure out why its not 16.4??