Question

Under good conditions, a car can travel at a maximum speed of vmax around a particular unbanked curve. In the aftermath of an ice storm, however, driving at that same speed will cause the car to slide off the road. Which of the statements below best describes why this is true? a. The friction force is no longer strong enough to balance the centripetal force and give the car zero acceleration. b. The friction force is needed to do negative work on the car to reduce the car's kinetic energy. c. The friction force no longer provides a strong enough unbalanced force to change the car's velocity quickly enough to stay on the curve. d. The car "floats" on the ice reducing the gravitational force which is what keeps the car on the road. e. [All of the above.]

          Under good conditions, a car can travel at a maximum speed of vmax around a particular unbanked curve. In the aftermath of an ice storm, however, driving at that same speed will cause the car to slide off the road. Which of the statements below best describes why this is true?
a. The friction force is no longer strong enough to balance the centripetal force and give the car zero acceleration.
b. The friction force is needed to do negative work on the car to reduce the car's kinetic energy.
c. The friction force no longer provides a strong enough unbalanced force to change the car's velocity quickly enough to stay on the curve.
d. The car "floats" on the ice reducing the gravitational force which is what keeps the car on the road.
e. [All of the above.]

Under good conditions, a car can travel at a maximum speed of vmax around a particular unbanked curve. In the aftermath of an ice storm, however, driving at that same speed will cause the car to slide off the road. Which of the statements below best describes why this is true?
a. The friction force is no longer strong enough to balance the centripetal force and give the car zero acceleration.
b. The friction force is needed to do negative work on the car to reduce the car's kinetic energy.
c. The friction force no longer provides a strong enough unbalanced force to change the car's velocity quickly enough to stay on the curve.
d. The car "floats" on the ice reducing the gravitational force which is what keeps the car on the road.
e. [All of the above.]

Added by Deanna C.

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