Question

A train has to negotiate a curve of radius 400m. By how much should the putter rail be raised with respect to inner rail for speed of 48 km/h? The distance between the rails is 1m.

(a) 0.20m

(b) 0.0454m

(c) 0.45m

(d) 0.020m

The question was posed to me in class test.

I'd like to ask this question from Friction and Forces in division Laws of Motion of Engineering Physics I

Answer 1

Correct option is (b) 0.0454m

Easiest explanation: h = (v^2 l)/rg

h = 40^2/3^2  = 0.0454m.