Circular freeway entrance and exit ramps are commonly bankedto handle a car moving at 13 m/s. To design a similar ramp for 26m/s one should:
A) Increase radius by factor of 2.
B) Decrease radius by factor of 2.
C) Increase radius by factor of 4.
D) Decrease radius by factor of 4.
E) Increase radius by factor of 2¹/².