What do you mean by curve resistance?
Curve resistance is the added resistance or “drag” on a train that must be overcome by the tractive effort in rounding a curve. Resistance is usually measured in newtons per ton of train weight.
What is radius of curvature in physics definition?
The radius of curvature of a spherical mirror is the radius of the circle of which the spherical mirror is a part. It can also be defined as the distance between the centre of curvature of the mirror and the pole of the mirror on the principal axis. The radius of curvature is also a measure of how curved the mirror is.
How do you find the resistance of a curve?
For example, in the USSR, the standard formula is Wr (curve resistance in parts per thousand or kgf/tonne) = 700/R where R is the radius of the curve in meters. Other countries often use the same formula, but with a different numerator-constant.
WHAT IS curve resistance for a 50 tonnes train on a BG track on a 4 curve tonne?
What is curve resistance for a 50 tonnes train on a BG track on a 4° curve? 0.05 tonne.
What will be train resistance due to curvature on a BG track for a 4 Dgree curve with weight of the train as 570 tonns?
It means that for a 4° curve on a BG line, the curve resistance for a train weighing 250 t would be 0.0004 x 250 x 4 = 0.4 t.
What is radius of curvature in physics class 10?
The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and centre of curvature. The sign convention for focal length and radius of curvature is the same.
What is radius of curvature formula?
Radius of Curvature Formula R= 1/K, where R is the radius of curvature and K is the curvature.
Which one of the following factors affect the selection of radius of a curve on a railway track?
The key parameters to determine the minimum curve radius of the railway are superelevation cant, unbalanced lateral acceleration, and other parameters; the determination of these parameters is influenced by complex factors such as the performance of high-speed train and track structure.
What is resistance in physics definition?
Resistance is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). All materials resist current flow to some degree.
How do you find resistance with length and diameter?
The resistance R of a cylinder of length L and cross-sectional area A is R=ρLA R = ρ L A , where ρ is the resistivity of the material.
What is the radius of curvature of a curve?
We use the term radius of curvature even when the motion isn’t exactly in a circle. For any point on a curve, the radius of curvature is 1 / κ. In other words, the radius of curvature is the radius of a circle with the same instantaneous curvature as the curve.
When to use Rho or Rho for radius of curvature?
Besides, we can sometimes use symbol ρ (rho) in place of R for the denotation of a radius of curvature. In differential geometry, it is used in Cesàro equation which tells that a plain curve is an equation that relates the curvature (K) at a point of the curve to the arc length (s) from the start of the curve to a given point.
How is the radius of curvature related to thermal stress?
Radius of curvature is also used in a three part equation for bending of beams. Stress in the semiconductor structure involving evaporated thin films usually results from the thermal expansion (thermal stress) during the manufacturing process. Thermal stress occurs because film depositions are usually made above room temperature.
How is the radius of a stressed structure measured?
The radius of the curvature of the stressed structure is related to stress tensor in the structure, and can be described by modified Stoney formula. The topography of the stressed structure including radii of curvature can be measured using optical scanner methods.