True or false In the design of roads and highways, the stationing of EVC is equal to stationing of BVC plus length of the curve. The distance of a point on a parabola from the focus is equal to the distance of the same point from the directrix. "x" raised to two equal to sixteen times "y" is an equation of a parabola. The distance of the focus from its vertex is sixteen.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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True or false

  1. In the design of roads and highways, the stationing of EVC is equal to stationing of BVC plus length of the curve.
  2. The distance of a point on a parabola from the focus is equal to the distance of the same point from the directrix.
  3. "x" raised to two equal to sixteen times "y" is an equation of a parabola. The distance of the focus from its vertex is sixteen.
  4. "y" raised to two equal to twenty four times "x" is an equation of a parabola. The distance of the focus from its vertex is six.
  5. In the design of roads and highways, the use of parabolic curve is always concave upward.
  6. If the vehicle enters a vertical curve with slope or grade at +5%, the curve is concave upward.
  7. The distance traversed during perception-reaction time is equal to 10 meters if the speed of the car is 10 meters per second, and the perception-reaction time of the driver is 1 second. 
  8. Stopping sight distance is always greater than the breaking distance.
  9. If dR = 10 meters and dB is 5 meters, the stopping sight distance is equal to 16 meters (with required 1 meter allowance).
  10. In the breaking distance formula, the coefficient of friction should be the coefficient of static friction between the tires and the road surface.
  11. Work is equal to displacement times applied force that is perpendicular to the direction of the displacement
  12. The grade of the parabolic curve is equal to the coefficient of friction of the road surface.
  13. In the design of roads and highways, coefficient of kinetic friction is always equal to 1.
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