Question

The distance between two rails is 5.1 m . The centre of gravity of the train at a height of 2m from the ground. The maximum speed of the train on a circular path of radius 120m can be

(a) 10.5 m/s

(b) 42 m/s

(c) 21 m/s

(d) 84 m/s 

Answer 1

Correct Option  (c) 21 m/s

Explanation:

Height of centre of gravity from the ground h = 2m, Acceleration due to gravit g =10 m/s²,

Distance between two rails 2a = 1.5m, Radius of circular path r = 120 m (given)