Q11 of 21 Page 109

A train has to negotiate a curve of 400m by how much the outer rail be raised with respect to inner rail for speed 48 kmhr–1. The distance between rails is 1m?

Here,

Speed = v = 48 km h–1


1 km = 1000 m


1 h = 3600 s





Let h be the height through which the outer rail must be raised with respect to the inner rail


Let θ be the angle of banking



For the small values of θ



We know,



Hence,







More from this chapter

All 21 →
9

A net force of 20 N acts on a 5kg mass kept at rest. Distance travelled by the mass in 6 s is

 10

A force acts for 10s on a stationary body of mass 100kg after which the force ceases to act. The body moves through a distance of 100 m in the next 5s. Calculate

(a) The velocity acquired by the body


(b) The acceleration produced by the force


(c) The magnitude of the force.

 12

If a fly collides with the windshield of the fast moving bus. Is the impact force experienced same for fly and bus? Why?

Is the same acceleration experienced by a fly and the bus? Why?

 13

A man of mass 50 kg carries a bag of weight 40N on his shoulder. The force with which the floor pushes up his feet will be?